26 part 2 - CHAPTER 26 Amino Acids Peptides Proteins Amino...

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Unformatted text preview: CHAPTER 26 Amino Acids Peptides Proteins Amino Acids, Peptides, Proteins 20 amino acids occur in the proteins from all living species species. Adult humans can synthesize all but eight of these amino acids and only two of the remaining 12 in amino acids and only two of the remaining 12 in insufficient quantities. These are called the essential amino acids . In all but glycine, the simplest amino acid, C2 is a stereocenter and is in the S (L) configuration. The pH at which the structure is electrically neutral is The pH at which the structure is electrically neutral is called the isoelectric pH, or pI . For an amino acid containing no addition ionizable For an amino acid containing no addition ionizable groups, the isoelectric pH is simply the average of its two pK a values: The amino acids arginine and histidine are both basic and contain guanidino and imidazole groups, respectively: Synthesis of Amino Acids: a Combination of Amine and Carboxylic Acid Chemistry Amine and Carboxylic Acid Chemistry...
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This note was uploaded on 12/26/2008 for the course CHEM CHEM 140C taught by Professor Finn during the Spring '08 term at UCSD.

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26 part 2 - CHAPTER 26 Amino Acids Peptides Proteins Amino...

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