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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
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Some functions of proteins
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Stereoisomerism in amino acids
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Conventions to identify carbons in amino acids
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Two cysteines can form a cystine, also called a disulfide bond
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Amino acids can act as acids and bases
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Formation of a peptide bond
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The pentapeptide serylglycyltyrosylalanylleucine Ser-Gly-Tyr-Ala-Leu or SGYAL
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Amino acid sequence of bovine insulin
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Direct Protein Sequencing
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Protein sequencing chemistry
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Breaking disulfide bonds in proteins
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