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  • Title: A protein homologous to the 27,000 dalton liver gap junction protein is present in a wide variety of species and tissues.
    Author: Hertzberg EL, Skibbens RV.
    Journal: Cell; 1984 Nov; 39(1):61-9. PubMed ID: 6091916.
    Abstract:
    The species and tissue specificities of gap junction polypeptides were investigated with antibodies raised against the 27,000 dalton rat liver gap junction protein. Cross-reacting 27,000 dalton polypeptides were detected in liver from mammalian, fish, and avian species by immunoreplica analyses and were localized to punctate regions of the plasma membrane by indirect immunofluorescence. They were also found in homogenates of other rat tissues, including pancreas, heart, brain, kidney, stomach, and adrenal gland, but not in lens fiber material. Localization of antibody binding in pancreas was similar to that of liver, while in heart ventricle the immunofluorescence pattern was consistent with binding to the intercalated disc. These findings indicate that homologous gap junction polypeptides may be widely distributed among vertebrate tissues.
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