. "Also catalyzes the transfer of a further methylgroup, producing phosphatidylcholine." . . . "Phosphatidyl-N-methylethanolamine N-methyltransferase" . "S-adenosyl-L-methionine + phosphatidyl-N-methylethanolamine = S-adenosyl-L-homocysteine + phosphatidyl-N-dimethylethanolamine." .