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  • Title: Inhibition of ouabain-binding to (Na+ + K+)ATPase by antibody against the catalytic subunit but not by antibody against the glycoprotein subunit.
    Author: Rhee HM, Hokin LE.
    Journal: Biochim Biophys Acta; 1979 Nov 16; 558(1):108-12. PubMed ID: 227457.
    Abstract:
    Antibodies against purified (Na+ + K+)ATPase from the rectal gland of Squalus acanthias, as well as against its catalytic subunit, inhibited ouabain binding by as much as 50%. However, antibodies against the glycoprotein subunit did not inhibit ouabain binding. These data suggest that binding of antibody against the catalytic subunit to the enzyme either covers the ouabain binding site or destroys its confirmation, while binding of antibody against the glycoprotein has no such effect.
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