P2RY1 (Purinergic Receptor P2Y1): P2RY1 is a G-protein coupled receptor that responds to extracellular nucleotides such as ATP and ADP. It plays a crucial role in intracellular signaling pathways involved in platelet aggregation, regulation of vascular tone, and neurotransmission. Activation of P2RY1 is vital for initiating platelet aggregation after vessel injury, emphasizing its importance in thrombosis and hemostasis. Dysregulation of P2RY1 signaling is linked to an increased risk of cardiovascular diseases, highlighting its role in vascular health.