Beta-adrenergic and muscarinic cholinergic receptors: overlap in their genetic determination.

Significant positive correlation between the ligand binding values for beta-adrenergic receptors and those for muscarinic cholinergic receptors was found in five inbred strains of mice (r = 0.84) and in different vertebrate species (r = 0.99). Comparative analysis of analogous receptor studies done on various brain regions in other laboratories revealed high positive correlation between regional binding values for these two receptors. In conjunction with the work presented here, an overlap in the genetic determination of beta-adrenergic and muscarinic cholinergic receptors is suggested.