ADP adenosine diphosphate

ATP adenosine triphosphate

ATPase adenosine triphosphatase

CD circular dichroism

CV cyclic voltammetry

cyt cytochrome

EC heterogeneous electron transfer followed by homogeneous chemical reaction

emf electromotive force

eu entropy unit

I intermediate

IHP inner Helmholtz plane

MO molecular orbital

MW molecular weight

N native state

NAD⁺ nicotinamide adenine dinucleotide (oxidized)

NADH nicotinamide adenine dinucleotide (reduced)

NHE normal hydrogen electrode = SHE

NMR nuclear magnetic resonance

OHP outer Helmholtz plane

P_i inorganic orthophosphate

PZC potential of zero charge

Q ubiquinone

QNH quinhydrone

SCE standard calomel electrode

SHE standard hydrogen electrode = NHE

SPS/CA single potential step absorptometry