Figure 7.

Mössbauer spectra of allylbenzene-inactivated (green) CPO at 4.2 K recorded in the presence of a field of 320 G applied parallel (Upper) and perpendicular (Lower) to the γ beam. A high-spin admixture amounting to 10% of the spectral area has been subtracted to remove extraneous peaks at |v| > 4.5 mm/s. In accordance with the EPR data, the correction consisted of 7% rhombic (g ≈ 8) and 3% axial (g ≈ 6) heme iron, and was modeled using the parameters of Champion et al. (31). The subtracted Mössbauer spectra (error bars) are overlaid on simulations (solid lines) based on Equation 1 using the parameters of Table 2.