. "\"Catalysis of the reaction: 2-polyprenyl-6-methoxy-1,4-benzoquinone + S-adenosyl-L-methionine = 2-polyprenyl-3-methyl-6-methoxy-1,4-benzoquinone + S-adenosyl-L-homocysteine.\" [GOC:kd, PMID:9083048]" . . "2-polyprenyl-6-methoxy-1,4-benzoquinone methyltransferase activity" . "2-polyprenyl-6-methoxy-1,4-benzoquinone methylase activity" . "coenzyme Q biosynthesis methyltransferase activity" . "coenzyme Q biosynthetic process methyltransferase activity" . "EC:2.1.1.-" . . "ubiquinone biosynthesis methyltransferase activity" . "ubiquinone biosynthetic process methyltransferase activity" .