Figure 4
Fe K-edge XAS spectra of Saccharomyces cerevisiae cytochrome c peroxidase single crystals (∼300 µm × 300 µm × 200 µm) recorded at SSRL BL9-3, showing (a) gradual photo-reduction of the Fe(IV) state at t = 0 to the Fe(III) state after ∼40 min exposure, and (b) gradual photo-reduction of the Fe(III) state to Fe(II). The insets depict the Fe K-edge 1s → 3d pre-edge transitions. |