Structure of the Repeating Unit in Peptidoglycan and the Manner in Which the Peptide and Glycan Units are Connected N-Acetylglucosamine ( N-Acetylmuramic acid M) CH2OH CHOH OH B(7 H,B01,4 H C=o C=o Lysozyme-sensitive CH3 HC-CH3 CH3 bond H3C-CH L-Alanine CH2-CH2 -CH-COOH D-Glutamic acid HOO一C-cH2-CH2CH2-CH Meso-diaminopimelic acid H3C-CH--COOH D-Alanine