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  • Title: Transferrin receptors on the human placental microvillous membrane.
    Author: Loh TT, Higuchi DA, van Bockxmeer FM, Smith CH, Brown EB.
    Journal: J Clin Invest; 1980 May; 65(5):1182-91. PubMed ID: 6245107.
    Abstract:
    A preparation of microvillous membrane vesicles from human placental syncytiotrophoblast binds transferrin to specific transferrin receptors. Transferrin binding to placental receptors is rapid, saturable, reversible, and specific. Approximately 2.5 X 10(13) receptors are present per milligram of membrane protein; the apparent association constant of transferrin for the placental receptor is 2.2 X 10(7) X M-1. No evidence for removal of iron from transferrin bound to intact membrane receptors was observed in these studies. Nonionic detergent solubilization and partial purification of the microvillous membrane transferrin receptor were carried out with preservation of the functional properties of the receptor.
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