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Adenosine receptor signaling pathway. A1 and A3 are couples though Gi/Go protein, inhibiting adenylyl cyclase and decreasing cAMP levels. A2a and A2b are coupled through Gs/Golf protein, stimulating adenylyl cyclase and increasing cAMP levels. (from Mazziotta et al.4; reuse permitted under the Creative Commons Attribution 4.0 International License [CC BY 4.0])
cAMP: Cyclic adenosine monophosphate, ATP: Adenosine triphosphate
