label: phosphatidyl-N-methylethanolamine N-methyltransferase activity
label_lc: phosphatidyl-n-methylethanolamine n-methyltransferase activity
description: "Catalysis of the reaction: S-adenosyl-L-methionine + phosphatidyl-N-methylethanolamine = S-adenosyl-L-homocysteine + phosphatidyl-N-dimethylethanolamine. Also catalyzes the transfer of a further methylgroup, producing phosphatidylcholine."