Phosphatidylethanolamines (bovine) (Synonyms: PE (bovine))

Phosphatidylethanolamine is the most abundant phospholipid in prokaryotes and the second most abundant found in the membrane of mammalian, plant, and yeast cells, comprising approximately 25% of total mammalian phospholipids. In the brain, phosphatidylethanolamine comprises almost half of the total phospholipids.[1]  It is synthesized mainly through the cytidine diphosphate-ethanolamine and phosphatidylserine decarboxylation pathways, which occur in the endoplasmic reticulum (ER) and mitochondrial membranes, respectively. It is a precursor in the synthesis of phosphatidylcholine and arachidonoyl ethanolamide and is a source of ethanolamine used in various cellular functions. In E. coli, phosphatidylethanolamine deficiency prevents proper assembly of lactose permease, suggesting a role as a lipid chaperone.[2]  It is a cofactor in the propagation of prions in vitro and can convert recombinant mammalian proteins into infectious molecules even in the absence of RNA.[3]

Phosphatidylethanolamines (bovine) is a mixture of phosphatidylethanolamines isolated from bovine brain with various fatty acyl groups at the sn-1 and sn-2 positions.

Reference:
[1]. Vance, J.E., and Tasseva, G. Formation and function of phosphatidylserine and phosphatidylethanolamine in mammalian cells. Biochim. Biophys. Acta 1831(3), 543-554 (2013).
[2]. Bogdanov, M., Sun, J., Kaback, H.R., et al. A phospholipid acts as a chaperone in assembly of a membrane transport protein. J. Biol. Chem. 271(20), 11615-11618 (1996).
[3]. Deleault, N.R., Piro, J.R., Walsh, D.J., et al. Isolation of phosphatidylethanolamine as a solitary cofactor for prion formation in the absence of nucleic acids. Proc. Natl. Acad. Sci. U.S.A. 109(22), 8546-8551 (2012).