Fig. 7: Proposed model of how AlpA functions at the alpB promoter.
From: Control of a programmed cell death pathway in Pseudomonas aeruginosa by an antiterminator
a In the absence of AlpA, transcription termination occurs at intrinsic terminator tB positioned downstream of the alpB promoter. Nascent transcript is in purple and RNAP is in gray. b AlpA first binds promoter at the putative AlpA binding element (ABE) positioned between the −10 and −35 elements of the promoter, then binds RNAP to allow RNAP to bypass the tB intrinsic terminator positioned downstream.
