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| Receptors, Adrenergic, alpha Adrenergic alpha-Receptors | Receptors, alpha-Adrenergic | alpha-Adrenergic Receptors | Receptor, Adrenergic, alpha | Adrenergic alpha Receptors | Receptors, alpha Adrenergic | alpha Adrenergic Receptors | alpha-Receptors, Adrenergic One of the two major pharmacological subdivisions of adrenergic receptors. The alpha-beta distinction was originally based on cellular effects of receptor activation but now relies on the relative affinities for certain synthetic ligands. alpha-Adrenergic receptors are further subdivided into several subclasses based on studies of endogenous and cloned receptors. |