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Sequences of the initially transcribed regions of the upp, codBA, pyrBI, and carAB P1 promoters. The nontemplate strand sequence is shown. The −10 region of each promoter is underlined, and the major transcriptional start sites are indicated by asterisks. Start sites are identified in the text according to their positions downstream from the −10 region; e.g., the major upp start sites are designated G6 and A7.
