Does not appear to have transporter activity. Sodium-independent organic anion transporter which exhibits high specificity for L-carnitine. Can also transport salicylic acid and the drug cimetidine. Expressed in proximal kidney tubules, and in liver hepatocytes (at protein level). Belongs to the major facilitator (TC 2.A.1) superfamily. Organic cation transporter (TC 2.A.1.19) family.