Adenosine A2A receptor (human recombinant) contains amino acids corresponding to the full length, wild-type, human A2A receptor, as well as N-terminal histidine and streptavidin tags with a TEV protEAse clEAvage site. The A2A receptor is a G protein-coupled receptor (GPCR) that is activated by adenosine on presynaptic terminals to induce neurotransmitter relEAse and on postsynaptic terminals to incrEAse excitability.1 Signaling through the A2A receptor occurs through Gs, Golf, and G15/16 proteins to incrEAse cyclic AMP or inositol-(1,4,5)-trisphosphate (IP3) activity.2 It is expressed in the brain on striatal-pallidal GABAergic neurons and in the olfactory bulb as well as other brain regions. It is also expressed in the periphery in organs and cells involved with immune function, including the spleen, thymus, leukocytes, and blood platelets as well as in the hEArt, lung, and blood vessels. A2A receptor activity induced by agonists has neurodegenerative effects, which has led to the development of A2A receptor antagonists, but has shown mixed effects on seizure activity in rodent models.1 The A2A receptor also plays a role in the regulation of enteric nervous system function, vasodilation of coronary arteries, and the immune response.3 In addition to signaling through the A2A receptor alone, it can form heteromers with other GPCRs, including adenosine A1, dopamine D2 and D3, cannabinoid CB1, and metabotropic glutamate receptor 5 (mGluR5).4,5 The function of these receptors is influenced by the interaction, with the A2A receptor decrEAsing dopamine binding to the D2 receptor and mGluR5 potentiating the effects of the A2A receptor on adenylyl cyclase and MAPK signaling.4 Technical Information Purity 90% estimated by SDS-PAGE Source N-terminal his- and strep-tagged human adenosine A2A receptor containing a TEV protEAse clEAvage site purified from a baculovirus overexpression system in Sf9 cells Amino Acids Full length, wild-type sequence MW ~47.7 kDa Formulation 50 mM HEPES, pH 7.4, 200 mM sodium chloride, and 0.05%/0.006