FIG 2.

NADH oxidase activity and assessment of H2O2 production by the Nox protein. (A) NADH oxidase activities of rNox and recombinant SSA_0375 (rSSA_0375) protein (a negative control). (B) Hydrogen peroxide production of rNox, Bacillus licheniformis NADH oxidase protein (Nox_Bli), and rSSA_0375 protein. ***, P < 0.001. Data were obtained at least in biological triplicate.