TABLE 3.
Effect of srb10Δ on repression of UASLEU2-HIS3-lacZ by LexA87-Ssn6a
| Protein | Genotype | β-Gal activityb
|
Fold repression | |
|---|---|---|---|---|
| −LexAop | +LexAop | |||
| LexA | WT | 292 | 232 | 1.3 |
| srb10Δ | 330 | 232 | 1.4 | |
| LexA87-Ssn6 | WT | 370 | 55 | 6.7 |
| srb10Δ | 436 | 253 | 1.7 | |
Isogenic strains MCY3912 (wild type [WT]) and MCY3668 (srb10Δ) were cotransformed with plasmid pBTM116 or pCK23 (21) expressing LexA and LexA87-Ssn6, respectively, and UASLEU2-HIS3-lacZ reporter plasmids with no or one LexA operator 5′ to UASLEU2 (Fig. 1).
β-Galactosidase (β-Gal) activity was assayed in permeabilized cells. Values are averages for three to five independent transformants. Standard errors were <17%.