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LEHNINGER PRINCIPLES OF BIOCHEMISTRY

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Presentation on theme: "LEHNINGER PRINCIPLES OF BIOCHEMISTRY"— Presentation transcript:

1 LEHNINGER PRINCIPLES OF BIOCHEMISTRY
David L. Nelson and Michael M. Cox LEHNINGER PRINCIPLES OF BIOCHEMISTRY Sixth Edition CHAPTER 3 Amino Acids, Peptides, and Proteins © 2013 W. H. Freeman and Company

2 Some functions of proteins

3 Stereoisomerism in amino acids

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6 Conventions to identify carbons in amino acids

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12 Two cysteines can form a cystine, also called a disulfide bond

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15 Amino acids can act as acids and bases

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19 Formation of a peptide bond

20 The pentapeptide serylglycyltyrosylalanylleucine Ser-Gly-Tyr-Ala-Leu or SGYAL

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25 Amino acid sequence of bovine insulin

26 Direct Protein Sequencing

27 Protein sequencing chemistry

28 Breaking disulfide bonds in proteins

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