FIG. 2.

Iron-reducing activity of A. ferrooxidans strain JCM 7811 grown on anaerobic iron respiration. (A) Lineweaver-Burk plot of iron-reducing activity of the cells on hydrogen. (B) Effects of respiratory inhibitors on iron-reducing activity of the cells. The rate of iron reduction at 2.0 mM of Fe³⁺ in the presence of HOQNO, hydrazine sulfate, 2,3-dimercapto-1-propanol, or PCMS at 100 μM was expressed as relative activity of control without the inhibitors. The datum points are averages of three independent determinations with the standard deviations.