LacZ expression from different promoter::<i>lacZ</i> fusions in the presence and the absence of the <i>cbpA</i> Fis binding region.

<p>The table shows <b>β</b>-galactosidase activities measured in <i>Escherichia coli</i> JCB387 cells, containing pRW50 carrying different promoter derivatives. Where present the <i>cbpA</i> Fis binding region is located between the <i>lacZ</i> start codon and the promoter transcription start site. Each data point is the average from at least three independent experiments with a standard deviation of <10%.