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  • Title: Adenylate cyclase in membrane fractions of RIN-A2-cells: studies with forskolin, NaF, GppNHp and NEM.
    Author: Trier JK, Kühn M, Ammon HP.
    Journal: Cell Biochem Funct; 1988 Apr; 6(2):131-5. PubMed ID: 3378316.
    Abstract:
    In crude membrane fractions of rat pancreatic islets and of RIN-A2-cells, forskolin and NaF stimulated adenylate cyclase activity. Basal and stimulated enzyme activity was approximately 3 to 6 fold higher in membranes of RIN-A2-cells than in membranes of islet cells. In RIN-A2-cells GppNHp and NEM inhibited forskolin-stimulated enzyme activity. The inhibitory effect of GppNHp could be reduced by NEM. It is suggested that the adenylate cyclase system of RIN-A2-cells contains inhibitory and stimulatory N-proteins and that there are critical thiols related to Ni, Ns and/or the catalytic unit. Thus, membrane fractions of RIN-A2-cells may be an appropriate model for studies on the adenylate cyclase system of insulin-producing cells.
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