Aliphatic Amino Acids Glycine (GLY) (a - amino ethanoate) NH3 + C COO￾H H Alanine (ALA) (a - amino propionate) NH3 + C COO￾H CH3Aliphatic Amino Acids Glycine (GLY) (a - amino ethanoate) NH3 + C COO￾H H Alanine (ALA) (a - amino propionate) NH3 + C COO￾H CH3