Table 3.

Induction of fecA-lacZ expression in E. coli AA93 Δfec pIS1034 fecA fecA-lacZsynthesizing wild-type FecR, FecR-(His)6, (His)10-FecR, or no FecR

Plasmidβ-Galactosidase activity (Miller units) in:
NB mediumNB medium and citrate
pIS136fecI 87
pIS135 fecI fecR 10446
pIHisR fecI fecRhis 7296
pIRHisfecIhisR 8281