Identification of the promoter of the <i>clpP1P2</i> operon.

<p>A) The regions upstream of <i>clpP1</i> or <i>clpP2</i> tested for promoter activity are marked. B) P₁₂₅ activity in <i>M. tuberculosis</i>. C) P<i>_clpP2</i> activity in <i>M. tuberculosis</i>. Promoter activity was measured in transformants grown to late exponential phase in standing liquid cultures. Results are the average activity ± standard deviation of three independent transformants assayed in duplicate. Activity is given in Miller Units (MU)- measured as nmol of O-nitrophenol produced per min per mg of protein. Control = pSM128 empty vector control.