Epistatic analysis of multicopy senS in mutants that affect aprE-lacZ expression. Cells were grown in Schaeffer's medium containing 0.2 mM IPTG. (A) •, TT715 degU+ (pDG148); ○, TT715 degU+ (pSEN24); ▪, TU38 degU (pDG148); □, TU38 degU (pSEN24). (B) •, OAM145 scoC+ (pDG148); ○, OAM145 scoC+ (pSEN24); ▪, OAM157 scoC (pDG148); □, OAM157 scoC (pSEN24). (C) •, OAM145 sinR+ (pDG148); ○, OAM145 sinR+ (pSEN24); ▪, OAM221 sinR (pDG148); □, OAM221 sinR (pSEN24). (D) ▪, OAM169 spo0A abrB (pDG148); □, OAM169 spo0A abrB (pSEN24).