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  • Title: A vasoactive intestinal peptide binding component in hen granulosa cells.
    Author: Kawashima M, Takahashi T, Yasuoka T, Kamiyoshi M, Tanaka K.
    Journal: Proc Soc Exp Biol Med; 1995 Sep; 209(4):387-91. PubMed ID: 7638247.
    Abstract:
    In radioligand assays, the vasoactive intestinal peptide (VIP) binding component in the membrane fraction of granulosa cells of the ovary of the hen was shown to possess characteristic properties of a receptor, such as reversible binding, binding specificity, high-affinity, and limited capacity. The binding site was of a single class. The binding affinity was higher in the largest (F1) and the second largest follicle (F2) than in the third largest follicle (F3), and the binding capacity was greater in F2 and F3 than in F1. During the ovulatory cycle, changes in affinity and capacity were observed only in F1 shortly before ovulation. The results suggest the presence of VIP receptor in the hen granulosa cells and its binding is assumed to be related to the follicular growth and ovulation.
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