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  • Title: Bovine neurophysin lipid complex. Their isolation, characterization and reaggregation.
    Author: Sawada Y, Audhya TK, Walter R.
    Journal: Int J Pept Protein Res; 1979 Oct; 14(4):317-25. PubMed ID: 521214.
    Abstract:
    A lipid-containing neurophysin fraction was isolated and purified from bovine posterior pituitary glands by acid extraction and affinity chromatography on a heparin-Sepharose 4B column. This lipid-rich fraction was found to be composed of noncovalent aggregates of neurophysin proteins and phospholipids such as phosphatidyl choline, phosphatidyl ethanolamine, phosphatidyl serine and sphingomyelin. The lipid-containing neuophysin was delipidated by treatment with choloform-methanol. The resultant apoproteins were characterized as bovine neuroions were developed for the reaggregation of purified bovine neurophysin-I and -II with lipids extracted from bovine posterior pituitary and hypothalamus and with synthetic lecithin. The resultant neurophysin lipid complexes have been shown to band upon isopycnic centrifugation at densities different from those of the respective purified bovine neurophysins.
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