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. 2017 Dec 26;23(1):50. doi: 10.3390/molecules23010050

Figure 1.

Figure 1

D1 and D2 Receptor Pathways–D1 and D2 receptors are G-protein coupled receptors that signal through different cascades. D1 receptor agonists lead to increased production of adenylyl cyclase (AC) via a Gs pathway. Conversely, agonism of D2 receptors stimulates Gi proteins leading to decreased cAMP and inhibiting neuronal activity.