L-Amino Acids CAS NO. L-Tryptophan 73-22-3 L-Methionine 63-68-3 L-Cystine 56-89-3 L-Lysine Base 56-87-1 L-Lysine Acetate 57282-49-2 L-Arginine Hydrochloride or L-Arginine HCl 1119-34-2 L-Glutamic acid ...