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embC-embA IGR mutations as promoters of embA and embB increase the transcriptional activity. β-Galactosidase activities in M. smegmatis recombinants with mutant embC-embA IGR mutation construct vectors (−8C-T, −11C-A, −11C-T, −16C-A, −16C-T, and −27T deletion) were higher than those in the recombinant with the wild-type construct vector (P = 0.0049, 0.0049, 0.0024, 0.0049, 0.0049, and 0.0049, respectively).
