. "In Rhodopseudomonas capsulata and Rubrivivax gelatinosus the enzyme is involved in biosynthesis of spheroidene." . "In Rubrivivax gelatinosus the enzyme also catalyzes the methylation of demethylspirilloxanthin to spirilloxanthin and the methylation of 3,4-didehydrorhodopin to anhydrorhodovibrin." . . . "Demethylspheroidene O-methyltransferase" . "1-HO-carotenoid methylase" . "1-hydroxycarotenoid methylase" . "1-hydroxycarotenoid O-methylase" . "S-adenosyl-L-methionine + demethylspheroidene = S-adenosyl-L-homocysteine + spheroidene." .