ID 2.1.1.118 DE Columbamine O-methyltransferase. CA S-adenosyl-L-methionine + columbamine = S-adenosyl-L-homocysteine + CA palmatine. CC -!- The product of this reaction is a protoberberine alkaloid that is CC widely distributed in the plant kingdom. CC -!- Distinct in specificity from EC 2.1.1.88. DR Q8H9A8, COOMT_COPJA; //