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. 1999 Apr;181(7):2059–2066. doi: 10.1128/jb.181.7.2059-2066.1999

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
a

ND, not determined. 

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