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  • Title: Evidence for vasoactive intestinal peptide receptors in apical membranes from tracheal epithelium.
    Author: Elgavish A, Pillion DJ, Meezan E.
    Journal: Life Sci; 1989; 44(15):1037-42. PubMed ID: 2538697.
    Abstract:
    [125I]VIP (vasoactive intestinal peptide) bound to apical membranes isolated from the bovine tracheal epithelium with a half maximal inhibition by unlabeled VIP (IC50) of 0.6 x 10(-9)M and binding was reversible. Glucagon did not affect [125I]VIP binding to the membranes. [125I]VIP was covalently cross-linked to tracheal membrane proteins using disuccinimidyl suberate. SDS-polyacrylamide gel electrophoresis of labeled tracheal membranes revealed one major [125I]-receptor complex of Mr = 71,000 to which binding of [125I]VIP was inhibited by 10 microM unlabeled VIP. These results are consistent with the presence of a specific, high-affinity receptor for VIP, with a Mr = 71,000, in apical membrane vesicles isolated from the bovine tracheal epithelium.
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