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. Author manuscript; available in PMC: 2013 Apr 1.
Published in final edited form as: J Biol Inorg Chem. 2012 Mar 2;17(4):647–662. doi: 10.1007/s00775-012-0885-0

Figure 4.

Figure 4

(a) Extinction coefficient difference spectra corresponding to each of the reduced ccNiR species C1 – C5 (Scheme 2), as calculated by fitting the experimental spectropotentiometric titration data using Eq. 6. The vertical line shows the point at which a high-spin ferroheme should have an absorbance maximum. (b) Similar to (a), but here the calculated absolute extinction coefficient spectra of C1 – C5, together with the spectrum of Cox, are shown. (c) Concentrations of the various ccNiR species present in solution at a given applied potential (vs SHE), obtained by fitting the data to Eq. 6.