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. 2009 Mar 13;191(10):3384–3391. doi: 10.1128/JB.01665-08

FIG. 5.

FIG. 5.

Effect of each Trx on survival during oxidative stress. (A) Wild-type strain 638R was compared to trx mutant strains in diamide disk diffusion assays on BHIS plates with no added cysteine. (B) Strain 638R harboring the empty expression vector pFD340 was compared to 638R strains harboring pFD340 containing B. fragilis trx genes in diamide disk diffusion assays on defined minimal medium. The values are mean diameters of growth inhibition zones measured in three independent experiments performed in triplicate and are given in millimeters. The error bars indicate standard deviations. *, P < 0.01 compared to wild-type strain. Strains in panel A: wild type (WT), 638R; ΔtrxC, IB458; ΔtrxD, IB469; ΔtrxE, IB490; ΔtrxF, IB491; ΔtrxG, IB471; and ΔtrxEF, IB492.