1,2-Didocosahexaenoyl-sn-glycero-3-phosphocholine is a polyunsaturated phospholipid that is a constituent of lipid monolayers and small unilamellar vesicles. 1,2-Didocosahexaenoyl-sn-glycero-3-phosphocholine can be used to prepare endoplasmic reticulum-targeted liposomes (PERLs) in a molar ratio of 1.5:1.5:1:1 with 1,2-didocosahexaenoyl-sn-glycero-3-phosphoethanolamine, l-α-phosphatidylinositol,