In minimal M9 medium , a striking 80-fold increase in pdxK expression was observed in the ptsJ knockout mutant strain with respect to Fig. 1A , clearly indicating that PtsJ is a transcriptional repressor of this gene .
In minimal M9 medium , a striking 80-fold increase in pdxK expression was observed in the ptsJ knockout mutant strain with respect to wild-type , clearly indicating that PtsJ is a transcriptional repressor of this gene .