Sodium-independent organic anion transporter which exhibits high specificity for a subset of prostaglandins including prostaglandin E2 (PGE2), prostaglandin E1 (PGE1), prostaglandin F2-alpha (PGF2-alpha) and prostaglandin D2 (PGD2). High activity at 37 degrees Celsius. Little or no activity at 0 degrees Celsius. Specifically expressed in kidney where it is found in proximal convoluted tubules (at protein level). Colocalizes with the prostaglandin-inactivating enzyme HPGD in kidney (at protein level). Not detected in other tissues tested. Belongs to the major facilitator (TC 2.A.1) superfamily. Organic cation transporter (TC 2.A.1.19) family.