ID 1.14.19.68 DE (S)-canadine synthase. AN (S)-tetrahydroberberine synthase. AN (S)-tetrahydrocolumbamine oxidase (methylenedioxy-bridge-forming). AN CYP719A. CA (S)-tetrahydrocolumbamine + O2 + reduced [NADPH--hemoprotein reductase] = CA (S)-canadine + H(+) + 2 H2O + oxidized [NADPH--hemoprotein reductase]. CC -!- A cytochrome P450 (heme-thiolate) protein found in plants. CC -!- The enzyme catalyzes an oxidative reaction that does not incorporate CC oxygen into the product. CC -!- Oxidation of the methoxyphenol group of the alkaloid CC tetrahydrocolumbamine results in the formation of the methylenedioxy CC bridge of canadine. CC -!- Formerly EC 1.1.3.36 and EC 1.14.21.5. DR Q50LH4, C7193_ESCCA; Q948Y1, C719A_COPJA; B1NF19, C719D_ARGME; DR I3QBP4, C7A21_PAPSO; //