TABLE 3.

Mutations at given positions in ampC promoter region for specific promoter typesa

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  • a Position numbering as defined by Jaurin et al. (13). Type numbers were assigned arbitrarily. WT, wild-type promoter from E. coli K-12; DEL, deletion at the indicated position.

  • b Positions −42, −18, and −15 are involved in the alternate promoter; positions −32 and −11 are part of the wild-type promoter; positions −13.1 and −13.2 are part of the spacer region of the wild-type promoter; nucleotides between positions +17 and +37 are located in the attenuator; and positions +63, +70, and +81 are located in the coding region.