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.com · PBP transpeptidase · molecular mimicry · acyl-enzyme · osmotic lysis
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Peptidoglycan wall (NAG–NAM strands)
PBP cross-link (D-Ala–D-Ala stitched)
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Beta-lactamase / PBP2a resistance
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.com · Beta-Lactam Antibiotics: How Penicillin Breaks the Bacterial Wall