A carboxyl-terminally truncated mutant and nonglycosylated A2a adenosine receptors retain ligand binding.

Abstract excerpt

The amino acids that comprise the ligand binding sites of adenosine receptors have not been identified. Adenosine and its agonist analogues differ from ligands for the well studied biogenic amine receptors and rhodopsin in that the adenosine receptor agonists are larger, contain a ribose moiety, and are uncharged at physiological pH. Thus, the locations of the ligand binding pockets of the adenosine receptors...

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