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Chromatogram showing the production of penicillin G by the wild-type, overexpression, and knockdown strains. (A) The standard shows the peak at a retention time of 5.58 min. (B) The wild type shows the peak at a retention time of 5.28 min. (C) The overexpression strain shows the peak at a retention time of 5.28 min. (D) The knockdown strain shows an absence of penicillin G. The peaks are indicated by the black arrows.
