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Yantra: a pattern matcher for dna and amino acid sequences.

A demo of a bio-informatics tool I made for college. This is supposed to be a private video but I can't share private videos with people at my university who don't have youtube accounts, so public this is.. It's probably of no use to you if you came here by accident. Category: Education Length: 00:04:39.750 Tags: .

 

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Introduction to amino acids and peptides (1)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and a problem discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid ... Category: Education Length: 00:08:03.750 Tags: .

 

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Amino acids found in space

Science & Reason on Facebook: tinyurl.com Does life exist elsewhere in the Universe? Perhaps. In August 2009, scientists announced the discovery of the amino acid, glycine, on the comet Wild 2. Amino acids provide key components for life here on Earth, but this is the first time we have definitive evidence of these molecules occurring in space. --- Please subscribe to Science & Reason: • www.youtube.com • www.youtube.com • www.youtube.com • www.youtube.com --- Amino acids are molecules containing an amine group, a carboxylic acid group and a side chain that varies between different amino acids. These molecules are particularly important in biochemistry, where this term refers to alpha-amino acids with the general formula H2NCHRCOOH, where R is an organic substituent. In the alpha amino acids, the amino and carboxylate groups are attached to the same carbon atom, which is called the αcarbon. The various alpha amino acids differ in which side chain (R group) is attached to their alpha carbon. These side chains can vary in size from just a hydrogen atom in glycine, to a methyl group in alanine, through to a large heterocyclic group in tryptophan. Amino acids are critical to life, and their most important function is their variety of roles in metabolism. One particularly important function is as the building blocks of proteins, which are linear chains of amino acids. Every protein is chemically defined by this primary structure, its unique sequence of amino acid residues ... Category: Science & Technology Length: 00:01:01.500 Tags: .

 

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The alpha globin amino acid sequence

This is a open educational resource from the SCOOTER project of De Montford University. www.sicklecellanaemia.org for more resources Category: Science & Technology Length: 00:01:06.750 Tags: .

 

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Protein structure

This video is on the four levels of protein structures. These four structures include the primary structure, secondary structure, tertiary structure, and quaternary structure. The primary structure is the sequence of amino acids, which builds up the protein and forms a polypeptide. The secondary structure includes different sequences of amino acids, which include patterns such as the helix and pleated sheet. Different sequences of amino acids result in different regions of polarity. These different sequences occur between close by regions of the polypeptide chain. The tertiary structure includes larger-scale interactions that occur between very distant parts of the polypeptide chain. The quaternary structure includes macro-interactions. The video describes each structure in detail through the narrative while giving visuals. Category: Science & Technology Length: 00:03:00.750 Tags: .

 

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Introduction to amino acids and peptides (2)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For a printable document containing the amino acid table discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid sequencing with ... Category: Education Length: 00:08:13.500 Tags: .

 

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Dna structure

The DNA structure consists of two chainlike molecules (polynucleotides) that twist around each other to form the classic double-helix. The cell's machinery forms polynucleotide chains by linking together four nucleotides. The nucleotides which are used to build DNA chains are adenosine (A), guanosine (G), cytidine (C), and thymidine (T). The DNA structure houses the information required to make all the polypeptides used by the cell. The sequence of nucleotides in DNA strands (called a 'gene') specifies the sequence of amino acids in polypeptide chains. Clearly a one-to-one relationship cannot exist between the four nucleotides of DNA and the twenty amino acids used to assemble polypeptides. The cell therefore uses groupings of three nucleotides (called 'codons') to specify twenty different amino acids. Each codon specifies an amino acid. Because some codons are redundant, the amino acid sequence for a given polypeptide chain can be specified by several different nucleotide sequences. In fact, research has confirmed that the cell does not randomly make use of redundant codons to specify a particular amino acid in a polypeptide chain. Rather, there appears to be a delicate rationale behind codon usage in genes. DNA structure -- Information and Design The molecular constituents of the DNA structure appear to have optimized chemical properties to produce a stable helical structure capable of storing the information required for the cell's operation. Detailed accounts of how ... Category: Education Length: 00:03:04.500 Tags: .

 

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Mrna translation (advanced)

The job of the mRNA is to carry the gene's message from the DNA out of the nucleus to a ribosome for production of the particular protein that this gene codes for. Originally created for DNA Interactive ( www.dnai.org ). TRANSCRIPT The job of this mRNA is to carry the genes message from the DNA out of the nuceus to a ribosome for production of the particular protein that this gene codes for. There can be several million ribosomes in a typical eukaryotic cell these complex catalytic machines use the mrna copy of the genetic information to assemble amino acid building blokes into the three dimensional proteins that are essential for life. Lets see how it works. The ribosome is composed of one large and one small sub-unit that assemble around the messenger RNA, which then passes through the ribosome like a computer tape. The amino acid building blocks (that's the small glowing red molecules) are carried into the ribosome attached to specific transfer RNAs. That's the larger green molecules also referred to as tRNA. The small sub-unit of the ribosome positions the mRNA so that it can be read in groups of three letters known as a codon. Each codon on the mRNA matches a corresponding anti-codon on the base of a transfer RNA molecule.The larger sub-unit of the ribosome removes each amino acid and join it onto the growing protein chain. As the mRNA is ratcheted through the ribosome, the mRNA sequence is translated into an amino acid sequence. There are three locations inside the ... Category: Education Length: 00:02:18 Tags: messenger rna ribosomal rna sequence of amino acids .

 

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The problem of protein sequencing

Proteins are composed of linear sequences of amino acids. How do protein chemists determine the sequence of a given protein? This webcast explores some of the problems associated with peptide sequencing. Category: Education Length: 00:02:02.250 Tags: .

 

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How are amino acids sequenced?

Folding@Home folding.stanford.edu Category: People & Blogs Length: 00:00:57 Tags: .

 

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Protein characterization i

This course is part of a series taught by Kevin Ahern at Oregon State University on General Biochemistry. For more information about online courses go to ecampus.oregonstate.edu www.youtube.com 1. Folding of proteins is dictated by the sequence of amino acids. Folding does not occur randomly. If it did, proteins would take longer than the age of the universe to fold and instead they fold in seconds. This is known as Levinthal's paradox. 2. The tendency of each amino acid to participate in alpha helices, beta strands/sheets, and turns are known and this information can be used to predict secondary structure of a protein from the amino acid sequence. 3. Misfolding of proteins can have disastrous consequences (but not necessarily always). One disastrous consequence is that of prions, which are "infectious" proteins implicated in diseases, such as mad cow disease and Creutzfeld-Jacob disease in humans. Each of these is a brain-wasting disease the results from misfolding of a brain protein known as PrP. The misfolded protein apparently helps convert properly folded proteins to the misfolded state and cause the disease. 4. Cells use chaperonin complexes to help insure proteins fold properly. Chaperonins are induced by heat shock of cells. Protein Purification 1. Purification of proteins exploits differences in charge, size, shape, and affinity for specific compounds. Centrifugation (artificial gravity) provides a means of precipitating cellular components. The faster one spins ... Category: Education Length: 00:37:18.750 Tags: osu ecampus online science biology .

 

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Introduction to amino acids and peptides (3)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For a printable document containing the amino acid table discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid sequencing with ... Category: Education Length: 00:05:11.250 Tags: .

 

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Genetics

Check us out at www.tutorvista.com Genetics (from Ancient Greek γενετικός genetikos, genitive and that from γένεσις genesis, origin[1][2][3]), a discipline of biology, is the science of heredity and variation in living organisms.[4][5] The fact that living things inherit traits from their parents has been used since prehistoric times to improve crop plants and animals through selective breeding. However, the modern science of genetics, which seeks to understand the process of inheritance, only began with the work of Gregor Mendel in the mid-nineteenth century.[6] Although he did not know the physical basis for heredity, Mendel observed that organisms inherit traits via discrete units of inheritance, which are now called genes. Genes correspond to regions within DNA, a molecule composed of a chain of four different types of nucleotides—the sequence of these nucleotides is the genetic information organisms inherit. DNA naturally occurs in a double stranded form, with nucleotides on each strand complementary to each other. Each strand can act as a template for creating a new partner strand—this is the physical method for making copies of genes that can be inherited. The sequence of nucleotides in a gene is translated by cells to produce a chain of amino acids, creating proteins—the order of amino acids in a protein corresponds to the order of nucleotides in the gene. This relationship between nucleotide sequence and amino acid sequence is known as the genetic code. The amino ... Category: Education Length: 00:05:27 Tags: .

 

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Sequence determination one terminal unit at a time

The Edman Degradation sequentially cleaves one amino acid at a time, facilitating the sequencing of a protein from N- to C-terminus. Category: Education Length: 00:02:06.750 Tags: .

 

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Introduction to amino acids and peptides (4)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For a printable document containing the amino acid table discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid sequencing with ... Category: Education Length: 00:08:13.500 Tags: .

 

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Introduction to amino acids and peptides (5)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For a printable document containing the amino acid table and a problem discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid ... Category: Education Length: 00:04:36 Tags: .

 

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Organic chemistry: amino acids and peptides (25)

Organic chemistry: Biochemistry--amino acids, peptides, and polypeptide sequencing. Acid/base properties of amino acids. How to draw amino acids at various pHs. How to determine pI of a peptide; zwitterion. Acylation of the N-terminus; conversion of the C-terminus into an amide. Total acid hydrolysis (TAH). Sangers reagent and Dansyl chloride. Hydrazine (NH2NH2). Proteolytic enzymes--chymotrypsin, trypsin, thermolysin. A polypeptide sequencing problem This is a recording of a tutoring session, posted with the students permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and the problems discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Acid/base properties of amino acids (2) Continued. How to draw amino acids at various pHs (glycine) (3) Continued (alanine, valine, leucine, isoleucine) (4) Continued (phenylalanine, proline). pH vs. pKa (5) How to draw amino acids at various pHs, continued (serine, threonine, tyrosine) (6) Continued (asparagine). Why amides are neither nucleophilic nor basic (7) How to draw amino acids at various pHs, continued (glutamine, lysine) (8) Continued (arginine, tryptophan) (9) Continued (histidine) (10 ... Category: Education Length: 00:06:16.500 Tags: .

 

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Introduction to amino acids and peptides (6)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For a printable document containing the amino acid table and a problem discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid ... Category: Education Length: 00:07:46.500 Tags: .

 

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Introduction to amino acids and peptides (7)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For a printable document containing the amino acid table discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid sequencing with ... Category: Education Length: 00:08:08.250 Tags: .

 

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Mrna translation (basic)

Originally created for DNA Interactive ( www.dnai.org ). TRANSCRIPT When the RNA copy is complete, it snakes out into the outer part of the cell. Then in a dazzling display of choreography, all the components of a molecular machine lock together around the RNA to form a miniature factory called a ribosome. It translates the genetic information in the RNA into a string of amino acids that will become a protein. Special transfer molecules, the green triangles, bring each amino acid to the ribosome. The amino acids are the small red tips attached to the transfer molecules. There are different transfer molecules for each of the twenty amino acids. Each transfer molecule carries a three letter code that is matched with the RNA in the machine. Now we come to the heart of the process. Inside the ribosome, the RNA is pulled through like a tape. The code for each amino acid is read off, three letters at a time, and matched to three corresponding letters on the transfer molecules. When the right transfer molecule plugs in, the amino acid it carries is added to the growing protein chain. Again, you are watching this in real time. And after a few seconds the assembled protein starts to emerge from the ribosome. Ribosomes can make any kind of protein. It just depends what genetic message you feed in on the RNA. In this case, the end product is hemoglobin. The cells in our bone marrow churn out a hundred trillion molecules of it per second! And as a result, our muscles, brain and all ... Category: Education Length: 00:01:33.750 Tags: messenger rna ribosomal rna sequence of amino acids .

 

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Organic chemistry: amino acids and peptides (20)

Organic chemistry: Biochemistry--amino acids, peptides, and polypeptide sequencing. Acid/base properties of amino acids. How to draw amino acids at various pHs. How to determine pI of a peptide; zwitterion. Acylation of the N-terminus; conversion of the C-terminus into an amide. Total acid hydrolysis (TAH). Sangers reagent and Dansyl chloride. Hydrazine (NH2NH2). Proteolytic enzymes--chymotrypsin, trypsin, thermolysin. A polypeptide sequencing problem This is a recording of a tutoring session, posted with the students permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and the problems discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Acid/base properties of amino acids (2) Continued. How to draw amino acids at various pHs (glycine) (3) Continued (alanine, valine, leucine, isoleucine) (4) Continued (phenylalanine, proline). pH vs. pKa (5) How to draw amino acids at various pHs, continued (serine, threonine, tyrosine) (6) Continued (asparagine). Why amides are neither nucleophilic nor basic (7) How to draw amino acids at various pHs, continued (glutamine, lysine) (8) Continued (arginine, tryptophan) (9) Continued (histidine) (10 ... Category: Education Length: 00:03:42 Tags: .

 

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Organic chemistry: amino acids and peptides (19)

Organic chemistry: Biochemistry--amino acids, peptides, and polypeptide sequencing. Acid/base properties of amino acids. How to draw amino acids at various pHs. How to determine pI of a peptide; zwitterion. Acylation of the N-terminus; conversion of the C-terminus into an amide. Total acid hydrolysis (TAH). Sangers reagent and Dansyl chloride. Hydrazine (NH2NH2). Proteolytic enzymes--chymotrypsin, trypsin, thermolysin. A polypeptide sequencing problem This is a recording of a tutoring session, posted with the students permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and the problems discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Acid/base properties of amino acids (2) Continued. How to draw amino acids at various pHs (glycine) (3) Continued (alanine, valine, leucine, isoleucine) (4) Continued (phenylalanine, proline). pH vs. pKa (5) How to draw amino acids at various pHs, continued (serine, threonine, tyrosine) (6) Continued (asparagine). Why amides are neither nucleophilic nor basic (7) How to draw amino acids at various pHs, continued (glutamine, lysine) (8) Continued (arginine, tryptophan) (9) Continued (histidine) (10 ... Category: Education Length: 00:06:21 Tags: .

 

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Organic chemistry: amino acids and peptides (17)

Organic chemistry: Biochemistry--amino acids, peptides, and polypeptide sequencing. Acid/base properties of amino acids. How to draw amino acids at various pHs. How to determine pI of a peptide; zwitterion. Acylation of the N-terminus; conversion of the C-terminus into an amide. Total acid hydrolysis (TAH). Sangers reagent and Dansyl chloride. Hydrazine (NH2NH2). Proteolytic enzymes--chymotrypsin, trypsin, thermolysin. A polypeptide sequencing problem This is a recording of a tutoring session, posted with the students permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and the problems discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Acid/base properties of amino acids (2) Continued. How to draw amino acids at various pHs (glycine) (3) Continued (alanine, valine, leucine, isoleucine) (4) Continued (phenylalanine, proline). pH vs. pKa (5) How to draw amino acids at various pHs, continued (serine, threonine, tyrosine) (6) Continued (asparagine). Why amides are neither nucleophilic nor basic (7) How to draw amino acids at various pHs, continued (glutamine, lysine) (8) Continued (arginine, tryptophan) (9) Continued (histidine) (10 ... Category: Education Length: 00:03:13.500 Tags: .

 

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Protein movie

videosbio.blogspot.com Proteins are organic compounds made of amino acids arranged in a linear chain and folded into a globular form. The amino acids in a polymer are joined together by the peptide bonds between the carboxyl and amino groups of adjacent amino acid residues. The sequence of amino acids in a protein is defined by the sequence of a gene, which is encoded in the genetic code In general, the genetic code specifies 20 standard amino acids; however, in certain organisms the genetic code can include selenocysteine—and in certain archaea—pyrrolysine. Shortly after or even during synthesis, the residues in a protein are often chemically modified by post-translational modification, which alters the physical and chemical properties, folding, stability, activity, and ultimately, the function of the proteins. Proteins can also work together to achieve a particular function, and they often associate to form stable complexes. videosbio.blogspot.com Category: Education Length: 00:01:06 Tags: .

 

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Ziz 026 aminosäuren - sd pal / ziz 026 amino acids - sd pal

Kategorie C - Liegt zur Lizenzierung ohne Wasserzeichen in folgendem Format vor: 720x576. Die Einbettung mit Wasserzeichen ist kostenlos. English: Category C - full version without watermark 720x576 (check terms and conditions at www.teledesign.de) The version with watermark is for free to embed - Description: All the many human, animal and plant proteins have one thing in common: they are built up from 21 amino acids. These amino acids like alanine, leucine, valine or glutamine are connected to long, mostly even very long chains. The different sequences of amino acids within these chain-like molecules -- the biochemist speaks of the "primary structure" -- are characteristic for the different proteins. These chains are commonly folded or twisted which results in the "secondary structure". Due to specific interactions within different parts of the molecule, often a three dimensional -- tertiary -- structure of the protein is defined. Category: Science & Technology Length: 00:00:45 Tags: .

 

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Organic chemistry: amino acids and peptides (27)

Organic chemistry: Biochemistry--amino acids, peptides, and polypeptide sequencing. Acid/base properties of amino acids. How to draw amino acids at various pHs. How to determine pI of a peptide; zwitterion. Acylation of the N-terminus; conversion of the C-terminus into an amide. Total acid hydrolysis (TAH). Sangers reagent and Dansyl chloride. Hydrazine (NH2NH2). Proteolytic enzymes--chymotrypsin, trypsin, thermolysin. A polypeptide sequencing problem This is a recording of a tutoring session, posted with the students permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and the problems discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Acid/base properties of amino acids (2) Continued. How to draw amino acids at various pHs (glycine) (3) Continued (alanine, valine, leucine, isoleucine) (4) Continued (phenylalanine, proline). pH vs. pKa (5) How to draw amino acids at various pHs, continued (serine, threonine, tyrosine) (6) Continued (asparagine). Why amides are neither nucleophilic nor basic (7) How to draw amino acids at various pHs, continued (glutamine, lysine) (8) Continued (arginine, tryptophan) (9) Continued (histidine) (10 ... Category: Education Length: 00:07:33.750 Tags: .

 

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Introduction to amino acids and peptides (8)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For a printable document containing the amino acid table discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid sequencing with ... Category: Education Length: 00:07:45.750 Tags: .

 

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Introduction to amino acids and peptides (9)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For a printable document containing the amino acid table discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid sequencing with ... Category: Education Length: 00:07:44.250 Tags: .

 

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Bite-sized biochemistry #5: protein structure iii

Lecture by Kevin Ahern of Oregon State University discussing Protein Structure II in BB 450. This course can be taken for credit (wherever you live) via OSU's ecampus. For details, see ecampus.oregonstate.edu See the full course at oregonstate.edu Download Metabolic Melodies at www.davincipress.com Related courses include BB 350 - oregonstate.edu BB 451 - oregonstate.edu BB 100 - oregonstate.edu Highlights Protein Structure 3 1. Another type of fibrous protein is collagen, the most abundant protein in your body. It contains three intertwined helices comprised of abundant repeating units of glycine, proline, and hydroxylproline 2. Hydroxylation of proline is a post-translational modification (occurs after the protein is made) and the hydroxyls are placed there in a reaction that uses vitamin C. 3. The hydroxyls of hydroxyproline can react with other, forming covalent cross-links that make the collagen fibers more sturdy. 4. Tertiary structure relates to interactions between amino acids in a protein that are not close in primary sequence. These interactions are made possible by folding to the protein chain to bring the distant amino acids closer together. 5. Tertiary structure is stabilized by disulfide bonds, ionic interactions, hydrogen bonds, hydrophilic, and hydrophobic interactions. Disulfide bonds are the strongest forces holding tertiary structure together, as they are covalent bonds. 6. Most proteins that are in cells are globular in nature. 7. Myoglobin is protein ... Category: Education Length: 00:39:39 Tags: .

 

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Introduction to amino acids and peptides (10)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and a problem discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid ... Category: Education Length: 00:08:15 Tags: .

 

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Introduction to amino acids and peptides (11)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For a printable document containing the amino acid table discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid sequencing with ... Category: Education Length: 00:08:00.750 Tags: .

 

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Protein structure i

This course is part of a series taught by Kevin Ahern at Oregon State University on General Biochemistry. For more information about online courses go to ecampus.oregonstate.edu www.youtube.com 1. Protein structure dictates protein function. The structure of a protein is a function of the sequence of amino acids comprising it. 2. Amino acids are the monomeric (building block) units of proteins. They are covalently joined together in peptide bonds to make proteins (polypeptides). 3. There are 20 amino acids commonly found in proteins and of these 20, 19 have a chiral center and thus can exist in two stereoisomeric forms. The only one that doesn't have a chiral center is glycine. Almost all biologically made amino acids are in the same stereoisomeric form - the 'L' form. The 'D' form occurs only in very rare peptides, such as in the cell wall of bacteria. 4. Amino acids are grouped into several structural categories based on the composition of their R groups - simple, aliphatic, aromatic, sulfhydryl bond, cyclic, aliphatic hydroxyl, R-amino (your book calls these basic because they have R groups with relatively high pKa's), carboxyamides, and acidic (have R groups with relatively low pKa's). You will need to know the names of the 20 amino acids of proteins, which of the groups above each one belongs to and will need to be able to predict ionization at given pH values if you are supplied pKa values. The problem solving videos I'll be posting soon illustrate this. Of these ... Category: Education Length: 00:35:30 Tags: osu ecampus online science biology .

 

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Organic chemistry: amino acids and peptides (18)

Organic chemistry: Biochemistry--amino acids, peptides, and polypeptide sequencing. Acid/base properties of amino acids. How to draw amino acids at various pHs. How to determine pI of a peptide; zwitterion. Acylation of the N-terminus; conversion of the C-terminus into an amide. Total acid hydrolysis (TAH). Sangers reagent and Dansyl chloride. Hydrazine (NH2NH2). Proteolytic enzymes--chymotrypsin, trypsin, thermolysin. A polypeptide sequencing problem This is a recording of a tutoring session, posted with the students' permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and the problems discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Acid/base properties of amino acids (2) Continued. How to draw amino acids at various pHs (glycine) (3) Continued (alanine, valine, leucine, isoleucine) (4) Continued (phenylalanine, proline). pH vs. pKa (5) How to draw amino acids at various pHs, continued (serine, threonine, tyrosine) (6) Continued (asparagine). Why amides are neither nucleophilic nor basic (7) How to draw amino acids at various pHs, continued (glutamine, lysine) (8) Continued (arginine, tryptophan) (9) Continued (histidine) (10 ... Category: Education Length: 00:07:50.250 Tags: .

 

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Organic chemistry: amino acids and peptides (23)

Organic chemistry: Biochemistry--amino acids, peptides, and polypeptide sequencing. Acid/base properties of amino acids. How to draw amino acids at various pHs. How to determine pI of a peptide; zwitterion. Acylation of the N-terminus; conversion of the C-terminus into an amide. Total acid hydrolysis (TAH). Sangers reagent and Dansyl chloride. Hydrazine (NH2NH2). Proteolytic enzymes--chymotrypsin, trypsin, thermolysin. A polypeptide sequencing problem This is a recording of a tutoring session, posted with the students permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and the problems discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Acid/base properties of amino acids (2) Continued. How to draw amino acids at various pHs (glycine) (3) Continued (alanine, valine, leucine, isoleucine) (4) Continued (phenylalanine, proline). pH vs. pKa (5) How to draw amino acids at various pHs, continued (serine, threonine, tyrosine) (6) Continued (asparagine). Why amides are neither nucleophilic nor basic (7) How to draw amino acids at various pHs, continued (glutamine, lysine) (8) Continued (arginine, tryptophan) (9) Continued (histidine) (10 ... Category: Education Length: 00:07:28.500 Tags: .

 

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Organic chemistry: amino acids and peptides (1)

Organic chemistry: Biochemistry--amino acids, peptides, and polypeptide sequencing. Acid/base properties of amino acids. How to draw amino acids at various pHs. How to determine pI of a peptide; zwitterion. Acylation of the N-terminus; conversion of the C-terminus into an amide. Total acid hydrolysis (TAH). Sangers reagent and Dansyl chloride. Hydrazine (NH2NH2). Proteolytic enzymes--chymotrypsin, trypsin, thermolysin. A polypeptide sequencing problem This is a recording of a tutoring session, posted with the students' permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and the problems discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Acid/base properties of amino acids (2) Continued. How to draw amino acids at various pHs (glycine) (3) Continued (alanine, valine, leucine, isoleucine) (4) Continued (phenylalanine, proline). pH vs. pKa (5) How to draw amino acids at various pHs, continued (serine, threonine, tyrosine) (6) Continued (asparagine). Why amides are neither nucleophilic nor basic (7) How to draw amino acids at various pHs, continued (glutamine, lysine) (8) Continued (arginine, tryptophan) (9) Continued (histidine) (10 ... Category: Education Length: 00:07:31.500 Tags: .

 

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Organic chemistry: amino acids and peptides (21)

Organic chemistry: Biochemistry--amino acids, peptides, and polypeptide sequencing. Acid/base properties of amino acids. How to draw amino acids at various pHs. How to determine pI of a peptide; zwitterion. Acylation of the N-terminus; conversion of the C-terminus into an amide. Total acid hydrolysis (TAH). Sangers reagent and Dansyl chloride. Hydrazine (NH2NH2). Proteolytic enzymes--chymotrypsin, trypsin, thermolysin. A polypeptide sequencing problem This is a recording of a tutoring session, posted with the students permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and the problems discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Acid/base properties of amino acids (2) Continued. How to draw amino acids at various pHs (glycine) (3) Continued (alanine, valine, leucine, isoleucine) (4) Continued (phenylalanine, proline). pH vs. pKa (5) How to draw amino acids at various pHs, continued (serine, threonine, tyrosine) (6) Continued (asparagine). Why amides are neither nucleophilic nor basic (7) How to draw amino acids at various pHs, continued (glutamine, lysine) (8) Continued (arginine, tryptophan) (9) Continued (histidine) (10 ... Category: Education Length: 00:07:24.750 Tags: .

 

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Protein sequencing

In this video I discuss the process of protein sequencing beginning with a polypeptide. I do a problem involving how to sequence a protein from two sets of fragments. Category: Education Length: 00:08:12 Tags: .

 

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Organic chemistry: amino acids and peptides (24)

Organic chemistry: Biochemistry--amino acids, peptides, and polypeptide sequencing. Acid/base properties of amino acids. How to draw amino acids at various pHs. How to determine pI of a peptide; zwitterion. Acylation of the N-terminus; conversion of the C-terminus into an amide. Total acid hydrolysis (TAH). Sangers reagent and Dansyl chloride. Hydrazine (NH2NH2). Proteolytic enzymes--chymotrypsin, trypsin, thermolysin. A polypeptide sequencing problem This is a recording of a tutoring session, posted with the students permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and the problems discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Acid/base properties of amino acids (2) Continued. How to draw amino acids at various pHs (glycine) (3) Continued (alanine, valine, leucine, isoleucine) (4) Continued (phenylalanine, proline). pH vs. pKa (5) How to draw amino acids at various pHs, continued (serine, threonine, tyrosine) (6) Continued (asparagine). Why amides are neither nucleophilic nor basic (7) How to draw amino acids at various pHs, continued (glutamine, lysine) (8) Continued (arginine, tryptophan) (9) Continued (histidine) (10 ... Category: Education Length: 00:06:07.500 Tags: .

 

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Organic chemistry: amino acids and peptides (28)

Organic chemistry: Biochemistry--amino acids, peptides, and polypeptide sequencing. Acid/base properties of amino acids. How to draw amino acids at various pHs. How to determine pI of a peptide; zwitterion. Acylation of the N-terminus; conversion of the C-terminus into an amide. Total acid hydrolysis (TAH). Sangers reagent and Dansyl chloride. Hydrazine (NH2NH2). Proteolytic enzymes--chymotrypsin, trypsin, thermolysin. A polypeptide sequencing problem This is a recording of a tutoring session, posted with the students permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and the problems discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Acid/base properties of amino acids (2) Continued. How to draw amino acids at various pHs (glycine) (3) Continued (alanine, valine, leucine, isoleucine) (4) Continued (phenylalanine, proline). pH vs. pKa (5) How to draw amino acids at various pHs, continued (serine, threonine, tyrosine) (6) Continued (asparagine). Why amides are neither nucleophilic nor basic (7) How to draw amino acids at various pHs, continued (glutamine, lysine) (8) Continued (arginine, tryptophan) (9) Continued (histidine) (10 ... Category: Education Length: 00:07:48.750 Tags: .

 

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Introduction to amino acids and peptides (12)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For a printable document containing the amino acid table discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid sequencing with ... Category: Education Length: 00:08:15 Tags: .

 

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Determining the amino acid composition of a protein

How do scientists determine the relative amounts of amino acids present in a protein? It's all organic chemistry! Learn more in this webcast. Category: Education Length: 00:04:39 Tags: .

 

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Organic chemistry: amino acids and peptides (13)

Organic chemistry: Biochemistry--amino acids, peptides, and polypeptide sequencing. Acid/base properties of amino acids. How to draw amino acids at various pHs. How to determine pI of a peptide; zwitterion. Acylation of the N-terminus; conversion of the C-terminus into an amide. Total acid hydrolysis (TAH). Sangers reagent and Dansyl chloride. Hydrazine (NH2NH2). Proteolytic enzymes--chymotrypsin, trypsin, thermolysin. A polypeptide sequencing problem This is a recording of a tutoring session, posted with the students permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and the problems discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Acid/base properties of amino acids (2) Continued. How to draw amino acids at various pHs (glycine) (3) Continued (alanine, valine, leucine, isoleucine) (4) Continued (phenylalanine, proline). pH vs. pKa (5) How to draw amino acids at various pHs, continued (serine, threonine, tyrosine) (6) Continued (asparagine). Why amides are neither nucleophilic nor basic (7) How to draw amino acids at various pHs, continued (glutamine, lysine) (8) Continued (arginine, tryptophan) (9) Continued (histidine) (10 ... Category: Education Length: 00:06:11.250 Tags: .

 

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Protein structure ii

This course is part of a series taught by Kevin Ahern at Oregon State University on General Biochemistry. For more information about online courses go to ecampus.oregonstate.edu www.youtube.com 1. In predicting charge of a molecule, a reasonable approximation (note that this is an approximation) is that if the pH of a solution in which an ionizable group is located is below the pKa by one or more units, the proton is ON, whereas if the pH of the solution is one or more units above the pKa, the proton is off. 2. The sequence of amino acids in a protein is ultimately responsible for all of the properties a protein has. The sequence of amino acids of a protein is referred to as its primary structure. Peptide bonds form resonance structures such that the bond itself behaves like a double bond. Double bonds cannot rotate (unlike single bonds) and thus they define a plane. Alpha carbons on either side of a peptide bond are generally arranged in a trans configuration (about 10000 trans to one cis), except when proline is involved. Peptide bonds involving proline favor the trans by about a 100 to 1 ratio. 3. The bonds around the alpha carbon (the carbon bonded to both an amino group and a carboxy group) can both rotate, however, because they are single bonds. One can thus describe a polypeptide as a series of planes separated by an alpha carbon. If we think of the alpha carbon as being in between two planes, then the plane on the left can rotate (theoretically) 360 degrees and ... Category: Education Length: 00:43:28.500 Tags: osu ecampus online science biology .

 

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Transcription and translation

In Transcription, the enzyme RNA polymerase travels to the nucleus. Once it arrives, it meets with a portion of DNA. RNA polymerase dissolves the hydrogen bonds that hold together the DNA molecule. Once the bonds are broken, the RNA polymerase reads the series of nitrogenous bases (of DNA) and creates corresponding nitrogenous bases. Those newly created nitrogenous bases make up the new polymer RNA. Once the process is completed, the hydrogen bonds are repaired and the RNA leaves the nucleus. In Translation, the RNA created during transcription is transported to the ribosome. The ribosome reads the RNA. Three nitrogenous bases makes up 1 codon. That codon codes for the creation of an amino acid. The type of amino acid is determined by the sequence of nitrogenous bases in the codon. The ribosome reads the entire RNA molecule, creating a polypeptide chain. When the process is done, the polypeptide chain leaves to perform its function, which is determined by its sequence of amino acids. Category: Science & Technology Length: 00:01:41.250 Tags: transcription translation .

 

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Introduction to amino acids and peptides (13)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For a printable document containing the amino acid table discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid sequencing with ... Category: Education Length: 00:08:15 Tags: .

 

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Lecture - 1 amino acids i

Lecture Series on BioChemistry I by Prof.S.Dasgupta, Dept of Chemistry, IIT Kharagpur. For more details on NPTEl visit nptel.iitm.ac.in Category: Education Length: 00:40:32.250 Tags: .

 

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Introduction to amino acids and peptides (14)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For a printable document containing the amino acid table discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid sequencing with ... Category: Education Length: 00:08:09.750 Tags: .

 

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#03 biochemistry amino acids lecture for bb 450/550 fall 2011

Alecture by Kevin Ahern to BB 450/550 at Oregon State University. A lecture by Kevin Ahern of Oregon State University to his BB 450/550 class. See the full course at oregonstate.edu This course can be taken for credit (wherever you live) via OSU's ecampus. For details, see ecampus.oregonstate.edu Download Metabolic Melodies at www.davincipress.com Related courses include BB 350 - oregonstate.edu BB 451 - oregonstate.edu BB 100 - oregonstate.edu Topics covered include amino acid structure/function, pH, pKa, pI, charge, ions, ionization, buffers, buffering capacity, proteins, shape, and zwitterions. 1. Molecules can have more than one buffering region. Alanine, for example has two pKas, one for the carboxyl group and one for the amine group. 2. A buffer system will be at maximum capacity when the concentration of the undissociated acid (HA) equals that of the salt (A-)- (Acid = Salt). 3. Amine systems (also in amino acids) have two forms: NH3+ and NH2. Note that the NH3+ is the acid and NH2 is the salt in my nomenclature. Carboxyl systems have two forms too. COOH has no charge and when it loses its proton, COO- has a negative one charge. 4. The Henderson Hasselbalch equation tells us we can predict the ratio of salt to acid as a function of pH if we know the pKa. Consequently, we can predict the charge on amino acids in a protein as the pH changes. 5. The value of the Henderson Hasselbalch equation is that by knowing the pH and the pKa of a molecule, the approximate charge ... Category: Education Length: 00:35:42.750 Tags: .

 

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Introduction to amino acids and peptides (15)

Organic chemistry: Biochemistry. How to draw amino acids. Acid/base properties of amino acids. Finding net charge of amino acids and peptides (proteins) at a specified pH. Zwitterions; finding the pI of amino acids and peptides. Peptide (amide) bonds. Amino acid sequencing with partial digestion by proteolytic enzymes such as trypsin. Total acid hydrolysis (TAH) This is a recording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and a problem discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Nucleophilic attack of an amine on a carboxylic acid to form an amide (peptide) bond. How to draw amino acids—alanine, isoleucine (2) Valine, arginine, lysine, glycine, histidine (3) Proline, tyrosine (4) Acid/base properties of amino acids; how to determine net charge of an amino acid at varying pHs (5) Continued (6) Determining the net charge on an amino acid at a specified pH (arginine) (7) Continued. pI of an amino acid (8) Continued (9) Continued (10) Peptides; peptide (amide) bonds (11) Continued. pI of a peptide (12) Continued (13) Continued (histidine) (14) Continued (15) Amino acid ... Category: Education Length: 00:04:45 Tags: .

 

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Organic chemistry: amino acids and peptides (16)

Organic chemistry: Biochemistry--amino acids, peptides, and polypeptide sequencing. Acid/base properties of amino acids. How to draw amino acids at various pHs. How to determine pI of a peptide; zwitterion. Acylation of the N-terminus; conversion of the C-terminus into an amide. Total acid hydrolysis (TAH). Sangers reagent and Dansyl chloride. Hydrazine (NH2NH2). Proteolytic enzymes--chymotrypsin, trypsin, thermolysin. A polypeptide sequencing problem This is a recording of a tutoring session, posted with the students permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the amino acid table and the problems discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) Acid/base properties of amino acids (2) Continued. How to draw amino acids at various pHs (glycine) (3) Continued (alanine, valine, leucine, isoleucine) (4) Continued (phenylalanine, proline). pH vs. pKa (5) How to draw amino acids at various pHs, continued (serine, threonine, tyrosine) (6) Continued (asparagine). Why amides are neither nucleophilic nor basic (7) How to draw amino acids at various pHs, continued (glutamine, lysine) (8) Continued (arginine, tryptophan) (9) Continued (histidine) (10 ... Category: Education Length: 00:08:07.500 Tags: .

 

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