P2RY1 (Purinergic Receptor P2Y1): P2RY1 is a G-protein coupled receptor that responds to extracellular nucleotides like ATP and ADP. It plays a key role in intracellular signaling pathways involved in platelet aggregation, regulation of vascular tone, and neurotransmission. Activation of P2RY1 is essential for triggering platelet aggregation following vessel injury, highlighting its importance in thrombosis and hemostasis. Dysregulation of P2RY1 signaling is associated with an increased risk of cardiovascular diseases, underlining its significance in vascular health.