Fig. 1

Blood-brain barrier and transporters for influx routes. Lat1, large neutral amino acid transporter 1; Cat1, high affinity cationic amino acid transporter 1; xTC, cystine/glutamate transporter; CNT2, concentrative nucleoside transporter; OCTN, organic cation/carnitine transporter; OATP, organic anion transporting polypeptide; Pht1/2, peptide/histidine transporter 1/2