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. 2008 Apr 4;74(11):3512–3522. doi: 10.1128/AEM.02663-07

FIG. 4.

FIG. 4.

Transcriptional activities of the trHb gene promoters under transition metal-induced hypoxia and iron depletion conditions. (A) glbN and (B) glbO promoter activities at different growth phases of M. smegmatis mc2155 in the presence of 2 mM NiCl3 and/or 20 μM FeCl3 and (C) glbN and (D) glbO promoter activities at different growth phases of M. smegmatis mc2155 in the presence of different concentrations of the iron chelator 2,2′dipyridyl. Statistical significance was established using a P value of <0.05.