How does penicillin works as an enzyme inhibitor?
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Penicillin binds at the active site of the transpeptidase enzyme that cross-links the peptidoglycan strands. ... Penicillin irreversibly inhibits the enzyme transpeptidase by reacting with a serine residue in the transpeptidase. This reaction is irreversible and so the growth of the bacterial cell wall is inhibited.
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