A3 adenosine receptor is a G protein-coupled receptor belonging to P1 family of purinergic receptors. It is widely distributed ... Ligands (agonists and antagonists) presenting high affinity and selectivity for the A3 adenosine receptor are essential for ... A3 adenosine receptor is a G protein-coupled receptor belonging to P1 family of purinergic receptors. It is widely distributed ... Ligands (agonists and antagonists) presenting high affinity and selectivity for the A3 adenosine receptor are essential for ...