FIG. 5.

Redox response of the cytochrome in cell extract and Fe³⁺. (A) Absorbance spectra of the crude extract of the cells grown on H₂/Fe³⁺(solid line) and the oxidized form of the purified cytochrome (dashed line). (B) Absorbance spectra of the mixture containing the crude extract and the oxidized form of the purified cytochrome with (dashed line) or without (solid line) Fe³⁺.