May be a receptor for oxidized free fatty acids derived from linoleic and arachidonic acids such as 9-hydroxyoctadecadienoic acid (9-HODE). Activates a G alpha protein, most likely G alpha(q). May be involved in apoptosis. Functions at the G2/M checkpoint to delay mitosis. May function as a sensor that monitors the oxidative states and mediates appropriate cellular responses such as secretion of paracrine signals and attenuation of proliferation. May mediate ths accumulation of intracellular inositol phosphates at acidic pH through proton-sensing activity (By similarity). Internalized and accumulated in endosomal compartments. LPC triggers the relocalization from the endosomal compartment to the cell surface. Highly expressed in hematopoietic tissues rich in lymphocytes like spleen and thymus. Weakly expressed in heart and lung. Highly expressed in infiltrating macrophages within atherosclerotic lesions. By DNA-damaging agents. Belongs to the G-protein coupled receptor 1 family.