demethylspheroidene O-methyltransferase Speedy inquiry In which to order Suppliers array In Rhodopseudomonas capsulata and Rubrivivax gelatinosus the enzyme is involved in biosynthesis of spheroidene. In Rubrivivax gelatinosus the enzyme also catalyses the methylation of demethylspirilloxanthin to spirilloxanthin and also the methylation of 3,four-