Compound as reactive (1)
ubiquinol-9 → 4 H+ + ubiquinone-9
Compound as product (1)
S-adenosyl-L-methionine + 3-demethylubiquinol-9 → S-adenosyl-L-homocysteine + H+ + ubiquinol-9
Reversible reaction (2)
an oxidized electron donor + ubiquinol-9 ↔ a reduced electron donor + ubiquinone-9
H2O + pyruvate + ubiquinone-9 ↔ acetate + ubiquinol-9 + CO2