PROBLEM TO BE SOLVED: To provide a cerebral organic anion transporter OAT3 which is useful as a protein regulating the uptake/excretion of organic anionic substances in the brain; a nucleic acid having a base sequence encoding the same; and an antibody against the same.
SOLUTION: The cerebral organic anion transporter OAT3, the base sequence encoding the same and the antibody against the same are provided. The amino acid sequence and the base sequence of the cerebral organic anion transporter OAT3 are shown in a sequence list in the specification.