FIG. 4.

UV-vis absorption spectra of apo-BsYybT84-659 and reconstituted BsYybT84-659 and GtYybT55-162. The proteins were reconstituted with ferric heme in the absence of reducing agent. The spectra were taken in 50 mM Tris (pH 8.0), 150 mM NaCl at 23°C.