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  • Title: Isolation and partial characterization of the major glycoprotein from the plasma membranes of AH-66 hepatoma cells.
    Author: Nakajo S, Nakaya K, Nakamura Y.
    Journal: Biochim Biophys Acta; 1979 Jul 25; 579(1):88-94. PubMed ID: 465537.
    Abstract:
    A major glycoprotein of the plasma membranes of AH-66 hepatoma ascites cells was isolated in essentially pure form and in milligram amounts. The plasma membranes were solubilized with a solution containing both 0.3 M lithium diiodosalycylate and 0.2% cetylpyridinium chloride, and further extracted with 50% phenol, followed by gel filtration on Sepharose 6B in the presence of 0.1% Ammonyx-LO at pH 8.0. The apparent molecular weight of the purified glycoprotein was estimated to be 165 000 in 5.6% polyacrylamide gels, of which 54% was carbohydrate and 46% was protein. The chemical composition of the glycoprotein resembles glycophorin A from human erythrocyte membranes in that it has a high content of N-acetylgalactosamine, N-acetylglucosamine, galactose and sialic acid and a particularly large proportion of serine, threonine, aspartic acid and glutamic acid.
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