A-adrenergic receptor. Definition

Medical Definition: a-adrenergic receptor

He who in his classification distinguishes two types: 1) ± -1: stimulate smooth muscle contraction and in turn are divided into four subtypes (1-A, 1-B, 1-C and 1-D), which differ in its amino acid sequence and its affinity for various agonists and antagonists, and 2) ± -2: have an inhibitory effect on smooth muscle contraction and are divided into three subtypes (2-A, 2-B and 2-C) .

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