3-demethylubiquinol-6 + S-adenosyl-L-methionine => ubiquinol-6 + S-adenosyl-L-homocysteine + H(+)
3-demethylubiquinol-6 + s-adenosyl-l-methionine => ubiquinol-6 + s-adenosyl-l-homocysteine + h(+)
3-demethylubiquinol-6 + S-adenosyl-L-methionine => ubiquinol-6 + S-adenosyl-L-homocysteine + H(+)
3-demethylubiquinol-6 + s-adenosyl-l-methionine => ubiquinol-6 + s-adenosyl-l-homocysteine + h(+)