TABLE 3.
Effects of high levels of cAMP on regulation of gcvT-lacZ by CRP
| Straina | Relevant genotype | β-Galactosidase activityb of cells grown in:
|
||
|---|---|---|---|---|
| GM medium | GM medium plus cAMP | Glycerol minimal medium | ||
| GS162 | Wild type | 129 | 154 | 105 |
| GS1068 | Δcrp::Cmr | 40 | 39 | — |
| GS1079 | Δ(cyaA1400)::Knr | 45 | 148 | — |
a
All strains carry the λgcvT-lacZΔ−341 fusion.
b
β-Galactosidase activity is in Miller units (25). All standard deviations were within 8% of the means, except with the result for GS1079 cells grown in GM medium, for which the standard deviation was within 20% of the mean. —, not determined.