Table 1.

Semi-empirical pathway analyses of tunneling matrix elements mediating inter-heme electron transfer. $\langle H_{if}^{PM}\rangle$ are given in eV².

Path	(%)	〈εtot〉	σ2	$\langle {\text{H}}_{\text{i}\text{f}}^{\text{P}\text{M}}\rangle$	$\langle {{\epsilon }_{\text{t}o\text{t}}}^2\rangle$	${\text{R}}_{\text{c}o\text{h}}^{\text{c}\text{l}}$
				eV
Fe2+/Fe3+
Trp378	92	2.04 10−5	7.44 10−11	–	–	–
Phe348	7	3.06 10−5	2.58 10−10	–	–	–
Total	100	2.12 10−5	9.62 10−11	3.75 10−6	5.43 10−10	0.82
Fe3+/Fe2+
Trp378	56	2.32 10−5	7.83 10−11	–	–	–
Phe348	44	3.93 10−5	2.75 10−10	–	–	–
Total	100	3.04 10−5	2.30 10−10	5.40 10−6	1.15 10−9	0.80