Multiple choice

The reaction of isopenicillin with phenyl acetate in producing penicillin G is catalysed by

  1. isopenicillin N synthase

  2. acyltransferase

  3. nonribosomal peptide synthetase

  4. PEP carboxylase
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B Correct answer
Explanation

The reaction of isopenicillin with phenyl acetate to produce penicillin G is catalysed by acyltransferase. This reaction is encoded by the gene penDE, which is unique in the process of obtaining penicillins.

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