In the H 2 O 2 –treated cultures, activity of the β-galactosidase reporter for the cat promoter showed a trend toward slight and progressive decrease over time, but none of the differences between the treated cultures and the untreated control cultures was statistically significant (P>0.05).
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Characterization of OxyR as a negative transcriptional regulator that represses catalase production in Corynebacterium diphtheriae.
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