TABLE 3.
CR of the bkd-gusA fusions by various carbon sources
| Carbon sourcea | GUS activity (nmol/min/mg)b | Repression ratioc |
|---|---|---|
| KIC | 176 (4.0) | 1 |
| KIC + gluconate (25 mM) | 130 (5.2) | 1.3 |
| KIC + fructose (25 mM) | 9.1 (0.6) | 19 |
| KIC + lactose (25 mM) | 13.5 (1.4) | 13 |
| KIC + glucose (25 mM) | 4.2 (0.1) | 42 |
a
E. faecalis OG1RF(pDW101) was grown aerobically in M17 media containing 20 mM KIC and the additional carbon sources indicated.
b
Average of three determinations +/− the standard deviation shown in parentheses.
c
Repression ratio was determined by dividing the GUS activity of the culture grown with KIC alone by that of the culture grown with KIC and the indicated additional carbon sources.