Chem 114A 2009 LEC 10 AS GIVEN 020509

Chem 114A 2009 LEC 10 AS GIVEN 020509 - Chem 114A Protein...

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Chem 114A Protein structure. Lecture 10 February 4, 2009 (Thursday) 1
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There are four levels of protein structure. 2 Review
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20 different R groups on α -amino acids. 3 Review
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Only “L” amino acids in proteins. 4 Review
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Amino and carboxyl groups are titratable. 5 Review
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Twenty amino acids in proteins. 6 Review
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Peptide sequences and names. AYDG 7 Review
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Disulfide bonds provide a mechanism for cross-linking polypeptide chains. Insulin 8 Review
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Green fluorescent protein in jelly fish. 9 Review
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Green fluorescent protein. 10 Review
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Twenty amino acids in proteins. 12
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Peptide bond formation. 13
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Polypeptide is a linear polymer of amino acids connected by peptide bonds. 14
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The backbone structure of a protein can be envisaged as a series of linked planes. 15
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Peptide bond properties are a consequence of its chemical bonds. • Rigid. • Trans. • Planar 16
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Orbitals in chemical bonds. Localized electron models suggest that atomic orbitals are involved in forming bonds. This explains the properties of some but not all molecules.
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Chem 114A 2009 LEC 10 AS GIVEN 020509 - Chem 114A Protein...

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