Characterization of muscarinic cholinergic receptors on rat pancreatic acini by N-[3H]methylscopolamine binding. Their relationship with calcium 45 efflux and amylase secretion.

Abstract

N-[3H]Methylscopolamine (NMS) binding, amylase secretion, and 45Ca efflux from dispersed rat pancreatic acini were investigated in parallel, in the presence or absence of 4 muscarinic agonists and 3 muscarinic antagonists. Scatchard analysis of [3H]NMS saturation isotherms gave a KD of 0.9 nM and an average binding capacity of 24,000 sites per cell. Binding… (More)

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