FIG. 1.

Expression patterns of aerR and crtJ. (A) β-Galactosidase activities of various aerR and crtJ reporter plasmids in the wild-type strain SB1003 cells grown under aerobic (black bars) and anaerobic (open bars) conditions. ONP, o-nitrophenyl-β-d-galactopyranoside. (B) Anaerobic and aerobic β-galactosidase activities present in various regulatory mutant strains containing plasmid pES15. Wild type is strain SB1003, crtJ is strain CD2-4, aerR is strain ES8, and regA is strain MS01. β-Galactosidase values represent the average of at least three independent assays.