highly significantP < 0.001
1 ): the strain with the mutation for the methionine regulator MetR showed a highly significant, severe defect (CI = 0.028 ± 0.021; P < 0.001), while the strain with the mutation for a regulator of unknown function encoded by the locus VC1947 exhibited a less significant defect (CI = 0.719 ± 0.632; P < 0.05).