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Combined effect of scoC and phoP cre1 promoter mutation on phoPR transcription during growth and stationary phase. Cells were grown in LPDMG for 10 h to monitor growth and level of transcription. Solid symbols represent the growth, and open symbols represent the β-galactosidase specific activity of the full-length phoPR-lacZ fusion in each strain. Circle, WT phoPR-lacZ (MH6024); square, phoPR-lacZ cre1-lacZ strain (MH6040); triangle, scoC phoPR-lacZ cre1-lacZ strain (MH7417).
