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Partial decrease of positive stringent transcription control of PkinB induced by base substitutions (T-27C C-26T). β-Gal synthesis by strains FU1115 PkinB (–55/+10) (circles), and FU1249 PkinB (–55/+10 T-27C C-26T) (squares) was monitored after addition of decoyinine to S6 medium. The β-Gal monitoring was performed with quadruple replicates.
