these ranged from the predominant disaccharide tetrapeptides possessing reducing or nonreducing 1,6-anhydro-n-acetylmuramic acid ends to relatively minor constituents containing glycine or asparagine in addition to traditional peptidoglycan amino acids , i.e . alanine , glutamic acid , and diaminopimelic acid .
C0002520
amino acids
C0061472
glutamic acid