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Identification of the transcription start sites in the rpoH gene in P.mirabilis. (A) Major products from primer extension experiments are indicated by numbers and black arrows (P1, P2 and P3). Lane 1, cells grown at 30°C; lane 2, cells grown at 30°C and exposed to 47°C for 5 min; lane 3, cells grown at 30°C and exposed to 47°C for 10 min. (B) Sequence of the regulatory region of the P.mirabilis rpoH gene. For key see Figure 5 legend.
