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嘌呤类受体分为腺苷激活的P1受体和细胞外核苷酸激活的P2受体两大类。根据组织反应类型和激动剂作用的效力顺序P2受体又可分为配体门控的离子通道受体(即P2X受
Purine receptors are divided into adenosine-activated P1 receptor and extracellular nucleotide-activated P2 receptor two broad categories. P2 receptors can be further divided into ligand-gated ion channel receptors (ie, P2X affected by the type of tissue response and the order of potency of agonist action