Figure 6. Biochemical analyses of peroxidase activities in M. tuberculosis WT, tpx mutant and the complemented strain.

Presence of hydrogen peroxide was measured by xylenol orange assay. The open bar, initial H₂O₂ at 1 mM. The solid bar, initial H₂O₂ at 0.5 mM. Control, H₂O₂ only. The data was repeated twice with similar results.