sentences:  Phosphatidylethanolamine has also shown to be able to propagate infectious prions without the assistance of any proteins or nucleic acids, which is a unique characteristic of it.Phosphatidylethanolamine is also thought to play a role in blood clotting, as it works with phosphatidylserine to increase the rate of thrombin formation by promoting binding to Factor V and Factor X, two proteins which catalyze the formation of thrombin from prothrombin.The synthesis of endocannabinoid anandamide is performed from the phosphatidylethanolamine by the successive action of 2 enzymes, the "N"-acetyltransferase and phospholipase-D
  
  Where phosphatidylcholine is the principal phospholipid in animals, phosphatidylethanolamine is the principal one in bacteria.