Fig. 1.

A σ^D-dependent promoter in gdpP. (a) Schematic map of the yybS-gdpP-rplI operon. Promoter sites are indicated by bent arrows with a subscript to indicate the relevant holoenzyme. The −35, −10 and +1 elements of P_yybS and the start codon of yybS are in bold type. The balloon indicates a transcriptional terminator. The DNA regions included in the P_yybS-lacZ and P_gdpPas-lacZ fusions are also illustrated. (b) Promoter sequence of gdpP_as. The sense gdpP start codon and the −35, −10 and +1 elements of the antisense P_gdpPas are shown in bold type. P_D* mutations are underlined.