Regulation of expression of the crp gene of Escherichia coli K-12: in vivo study

Expression of the crp gene was studied in vivo by use of a crp-lacZ gene fusion first constructed on a plasmid and then transferred onto the chromosome. Our in vivo data confirm the in vitro findings that crp is negatively autoregulated via the cyclic AMP-catabolite gene activator protein complex. We present evidence that gene crp is repressed by glucose.