Table 2.

Redox potentials of various heme proteins.

Protein	Axial Ligation	E0’ (mV)	Reference
GLB-6 (1–389)	His/His	−193 ± 2 mV	this work
Truncated Hba	His/His	−195	(64)
Rice Hbb	His/His	−143	(64)
Ngbc	His/His	−115	(64)
Cgbd	His/His	−28	(64)
Cyt b5e	His/His	−2	(64)
Mb H64V/V68Hf	His/His	−128	(52)
Mb wt	(H2O)/His	+54	(52)
CDH M65Hg	His/His	−53	(49)
CDH wt	His/Met	+164	(49)
Cyt c551 M61Hh	His/His	+55	(50)
Cyt c551 wt	His/Met	+260	(50)
Cyt c M80Hi	His/His	+41	(51)
Cyt c wt	His/Met	+260	(51)

^atruncated hemoglobin from the cyanobacterium Synechocystis,

^brice non-symbiotic hemoglobin,

^chuman neuroglobin,

^dhuman cytoglobin,

^ebovine erythrocyte cytochrome b₅,

^fhuman/pig myoglobin,

^gcellobiose dehydrogenase from white rot fungus Phanerochaete chrysosporium,

^hcytochrome c₅₅₁ from bacterium Pseudomonas stutzeri,

ⁱcytochrome c from horse heart.