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. 2024 Sep 26;52(5):1981–1993. doi: 10.1042/BST20230027

Figure 1. Chemical structure of peptidoglycan with enzymatic cleavage sites.

Figure 1.

Schematic representation of the archetypal structure of muropeptides consisting of NAG-NAM disaccharides attached to a peptide chain containing 2–5 typical amino acid residues. In this model, a DD-cross-linking (product of DD-transpeptidation by PBPs) is shown (blue dashed line). The main enzymatic degradative activities involved in PG adaptation are shown with their respective cleavage sites. NAG, N-acetyl-glucosamine; NAM, N-acetyl muramic acid; L-Ala, L-Alanine; D-Glu-(γ), D-glutamic acid; mesoDap or DAP, meso-diaminopimelic acid (Gram-negatives); L-Lys, L-lysine (Gram-positives); D-Ala, D-Alanine.