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Chromatogram for checking the activity of penicillin G. (A) The standard shows the peak at a retention time of 4.86 min. (B) The wild type shows the peak at a retention time of 5.13 min. (C) The overexpression strain shows the peak at a retention time of 5.03 min. The fraction of the extract peak was collected at their respective retention times. AU, arbitrary units.
