TABLE 3.
Effects of bkdR and sigL mutations on ptb′-′lacZ expression
Strain | Relevant genotype | β-Galactosidase activity (Miller units/mg of protein) in the following minimal mediuma:
|
||||
---|---|---|---|---|---|---|
MM | MM + isoleucine (20 mM) | MM + α-keto-β-methylvalerate (20 mM) | MM + valine (20 mM) | MM + α-keto-isovalerate (20 mM) | ||
QB7501 | amyE::ptb′-′lacZ | 55 | 2,265 | 950 | 1,145 | 400 |
QB7502 | amyE::ptb′-′lacZ sigL::aphA3 | 5 | 5 | ND | 5 | ND |
QB7511 | amyE::ptb′-′lacZ bkdR::aphA3 | 5 | 1 | ND | 5 | ND |
QB7530 | amyE::ptb′-′lacZ bkdR::aphA3 pBkdR1 | 140 | 2,440 | ND | 2,120 | ND |
ND, not determined.