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Induction of the soxR gene by treatment with paraquat (PQ). PAK strains containing pDN19lacΩ (vector control), pHW9802 (soxR::lacZ fusion), or pHW9811 (pbpC::lacZ fusion) were grown in L broth at 37°C in the presence of 0 to 1.0 mM PQ. Samples were taken after 3 h of induction to measure β-galactosidase activities. Average values from three repeated tests are shown.
