Table 1.

Self-exchange reorganization energies for selected metal-aquo ions and metalloproteins.

Redox Center	Protein	λ, eV
[Fe(OH2)6]3+/2+		2.5(1)a
[Co(OH2)6]3+/2+		3.7(1)a
[Ru(OH2)6]3+/2+		1.8(1)a
[Fe(heme)(SMet)(NHis)]	cytochrome c	0.7(1)b
[Cu(SCys)(NHis)2]	azurin	0.7(1)c
[Cu2(µ-SCys)2(NHis)2]	CuA domain	<0.5(1)d
[Fe4S4(SCys)4]	HiPIPe	0.6(2)f

^aN. Sutin³⁸

^bMines et al⁴³

^cDiBilio et al⁴⁴

^dP. Brzezinski;⁴⁵ O. Farver et al.;⁴⁶ B. E. Ramirez et al⁴⁷

^eHigh potential iron protein.

^fE. Babini et al⁴⁸