P2X Receptor Chimeras Highlight Roles of the Amino Terminus to Partial Agonist Efficacy, the Carboxyl Terminus to Recovery from Desensitization, and Independent Regulation of Channel Transitions

P2X receptor subtypes can be distinguished by their sensitivity to ATP analogues and selective antagonists. We have used chimeras between human P2X1 and P2X2 receptors to address the contribution of the extracellular ligand binding loop, transmembrane segments (TM1 and TM2), and intracellular amino...

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