Compound as reactive (2)
menaquinone-8 + formate → menaquinol-8 + CO2
2 H+ + menaquinone-8 + (S)-malate → menaquinol-8 + oxaloacetate
Compound as product (4)
S-adenosyl-L-methionine + 2-demethylmenaquinone-8 → menaquinone-8 + S-adenosyl-L-homocysteine + H+
2 H+ + menaquinol-8 + fumarate → menaquinone-8 + succinate
dimethyl sulfoxide + menaquinol-8 + H+ → H2O + menaquinone-8 + dimethyl sulfide
2 menaquinol-8 + 4 H+ + oxygen → 2 menaquinone-8 + 4 H+ + 2 H2O
Reversible reaction (4)
an oxidized electron donor + menaquinol-8 ↔ menaquinone-8 + a reduced electron donor
menaquinol-8 + nitrate ↔ H2O + menaquinone-8 + nitrite
menaquinol-8 + NAD+ ↔ menaquinone-8 + NADH + H+
menaquinol-8 + NAD+ + 4 H+ ↔ menaquinone-8 + NADH + 5 H+