Structure of the Repeating Unit in Peptidoglycan and the Manner in Which the Peptide and Glycan Units are Connected N-Acetylglucosamine (G) N-Acetylmuramic acid (M) CHOH CH2OH OH 1,4) B14 1,4 H NH H NH C=O C=o Lysozyme-sensitive HC-CHa CHa bond =0 Peptide bond H2C-CH- L-Alanine CH2-CH2-CH-COOH D-Glutamic acid NH2 HOOC- CH2-CH2-CH2-CH Meso-diaminopimelic acid H HC-CH-COOH D-Alanine