TABLE 1.
Effects of hns and stpA mutations and plasmids on expression of the bgl operon as assayed by phospho-β-glucosidase activity
| Strain | Relevant genotype | Phospho-β-glucosidase activitya |
|---|---|---|
| GM37 | Wild type | 0.78 (0.05) |
| CJD1124 | ΔstpA::Tcr | 0.51 (0.03) |
| CJD898 | hnrG::Apr | 0.59 (0.05) |
| GM230 | hns-205::Tn10 | 0.59 (0.04) |
| CJD899 | hns-205::Tn10 hnrG::Apr | 1.03 (0.02) |
| CJD1126 | hns-205::Tn10 ΔstpA::TcrhnrG::Apr | 57.3 (0.42) |
| CJD1126(pYCStpA) | hns-205::Tn10 ΔstpA::TcrhnrG::Apr (StpA+) | 0.54 (0.03) |
| CJD1126(pYCStpAΔ65C) | hns-205::Tn10 ΔstpA::TcrhnrG::Apr (StpA−) | 64.5 (1.37) |
| CJD829 | hns2 | 83.0 (3.17) |
| CJD1125 | hns2 ΔstpA::Tcr | 105 (5.66) |
a
Duplicate cultures were assayed; mean values, in relative units calculated as for β-galactosidase, are shown. Standard deviations are in parentheses.