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    Nature. 1995 Mar 9;374(6518):135-41.

    The G-protein-gated atrial K+ channel IKACh is a heteromultimer of two inwardly rectifying K(+)-channel proteins.

    Source

    Department of Pharmacology, Mayo Foundation, Rochester, Minnesota 55905.

    Abstract

    Heart rate is slowed in part by acetylcholine-dependent activation of a cardiac potassium (K+) channel, IKACh. Activated muscarinic receptors stimulate IKACh via the G-protein beta gamma-subunits. It has been assumed that the inwardly rectifying K(+)-channel gene, GIRK1, alone encodes IKACh. It is now shown that IKACh is a heteromultimer of two distinct inwardly rectifying K(+)-channel subunits, GIRK1 and a newly cloned member of the family, CIR.

    PMID:
    7877685
    [PubMed - indexed for MEDLINE]

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