obsolete phosphatidylcholine biosynthesis from phosphoryl-ethanolamine via N-dimethylethanolamine phosphate and CDP-choline (obsolete GO:0070832)
OBSOLETE. The phosphatidylcholine biosynthetic process that begins with three consecutive N-methylation steps that are carried out on phospho-bases, phosphoethanolamine, phospho-N-methylethanolamine, and phospho-N-dimethylethanolamine; the process ends with the conversion of a phosphatidyl-N-dimethylethanolamine to a phosphatidylcholine.