TABLE 5.
Effect of a codY mutation on the expression of the bkd operon
Strain | Relevant genotype | β-Galactosidase activity (Miller units/mg of protein) in the following minimal medium:
|
|||
---|---|---|---|---|---|
MM + glucose | MM + glucose + isoleucine (20 mM) | MM + glucose + 0.2% Casamino Acids | MM + glucose + 0.2% Casamino Acids + isoleucine (20 mM) | ||
QB7501 | ptb′-′lacZ | 20 | 1,975 | 45 | 575 |
QB7522 | ptb′-′lacZ codY::erm | 140 | 2,255 | 765 | 2,325 |