Diverse G protein and beta-adrenergic receptor mRNA expression in normal and failing porcine hearts.


Right atrial and left ventricular homogenates have similar protein composition and beta-adrenergic receptor (beta-AR) numbers, but the right atrium has > 58% less adenylyl cyclase activity than the left ventricle. Associated with distinctive patterns of adenylyl cyclase activities are differences in G protein regulation between the two chambers. Compared… (More)


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