Stereochemistry of a-Amino Acids COOH CHO COOH H H H COOH CHO COOH H2N H HO H H2N- H CH3 CH2OH R L-alanine L-(-)-glyceraldehyde an L-amino acid (S)-alanine (S)-glyceraldehyde (S)configuration Copyright2010 Pearson Prentice Hall,Inc. Chapter 24 5Chapter 24 5 Stereochemistry of -Amino Acids