Compound as reactive (1)

S-adenosyl-L-methionine + demethylmenaquinol-6 → S-adenosyl-L-homocysteine + menaquinol-6 + H⁺

Compound as product (2)

H⁺ + 1,4-dihydroxy-6-naphthoate + all-trans-hexaprenyl diphosphate → demethylmenaquinol-6 + diphosphate + CO₂

1,4-dihydroxy-2-naphthoate + H⁺ + all-trans-hexaprenyl diphosphate → demethylmenaquinol-6 + diphosphate + CO₂

Reversible reaction (1)

an oxidized electron donor + demethylmenaquinol-6 ↔ 2-demethylmenaquinone-6 + a reduced electron donor