Mutations affecting two different steps in transcription initiation at the phage A PRM promoter ( RNA polymerase / A promoters ) MING - CHE


The abortive initiation assay [McClure, W. R. (1980) Proc. NatL Acad. Sci USA 77, 5634-5638] was used to study the effects of mutations on the activity of the PRM promoter of phage A in vitro. The transcription initiation properties of four mutant promoters were compared with those of wild-type PRM in the presence or absence of repressor (which activates… (More)


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