Stereochemistry of a-Amino Acids COOH CHO COOH H-N HO H cH,H】 H H COOH CHO COOH H2N H HO- H H2N- H CH3 CH2OH R (S)-alanine L-(-)-glyceraldehyde an L-amino acid (L-alanine) (S)configurationStereochemistry of -Amino Acids