Figure 5.

Photoreduction of iNOS_heme using wire 6. Illumination of the iNOS_heme:wire complex under an atmosphere of CO causes an increase in absorption at 420 nm, consistent with the formation of the reduced CO-bound P-420 species (black line, 0 min, blue line, 30 min). 1 mM TMPD was used for the experiment; no spectral change was observed without TMPD, or without light. Chemical reduction with Na₂S₂O₄ in the dark results in production of a combination of P-450 and P-420 species (red line).