Assertion: adenosine's receptor | /r/HasProperty | a 1
Facets:
Source sentences:
text: Adenosine is an ancient extracellular signaling molecule that regulates various biological functions via activating four G-protein-coupled receptors, A 1 , A 2A , A 2B , and A 3 adenosine receptors.
text: Adenosine binds to four specific cell membrane G-protein-coupled receptors (GPCRs) known as adenosine receptors (ARs): A 1 , A 2A , A 2B , and A 3 .