Fig 3. Role of ferritins in providing protection to M. tuberculosis against oxidative stress.

Various M. tuberculosis strains were grown in the minimal media containing (a) 1 mM H₂O₂ and (b) 50 μM FeCl₃ + 0.25 mM H₂O₂. These experiments were performed thrice and the mean values ± standard errors of the means are plotted. WT: M.tbH37Rv, BKO: ΔbfrB mutant, AKO: Δ bfrA mutant, DKO: ΔbfrA and ΔbfrB double mutant, Bcomp: ΔbfrB mutant complemented with bfrB gene and Acomp: ΔbfrA mutant complemented with bfrA gene.