| purification and characterization of vitellin-2 from the ovary of the american cockroach, periplaneta americana. | two vitellins (vn-1 and vn-2) were identified in cockroach ovary. vn-2 was purified by ion-exchange chromatography using deae cellulose and sepharose cl-6b, and gel filtration using sephadex g-200 and sepharose 4b. vn-2 comprises three subunits with molecular weights of 102, 72 and 40 kda. vn-2 contains diacylglycerol and triacylglycerol; their fatty acids are mostly lauric acid and palmitoleic acid. vn-2 also has phosphatidylcholine and phosphatidylethanolamine but no sphingomyelin. vn-2 contai ... | 1994 | 8205388 |