FIG. 6.

Active sites of TmNtrPrxC40S. (A) Transparent accessible surface representation of TmNtrPrxC40S. Main chain of subunits A (dark gray) and B (light gray) are represented in sticks, whereas FMN, SO₄ molecules, and S atoms of disulfide bridges are represented as black spheres. (B) Schematic diagram generated using LIGPLOT showing the coordination of FMN and of SO₄ binding in the active site of Prx module of chain A. In both chains, FMN and SO₄ molecules have the same coordination.