Fig. 3. The defect in AP folding exhibited by a dsbA mutation is not suppressed by mutations in ompL. AP assays were performed in rich and minimal media as described in Materials and methods. A representative set of results obtained in minimal medium with the wild-type strain MG1655 (WT) and its mutant derivatives is shown. The corresponding mutations are indicated at the bottom of the figure. The assays were done in triplicate and the standard deviation is represented by the error bars. The ompL allele shown here is the ompL::mini-Tn10Kan^R allele (Dartigalongue et al., 2000).