Organic anion transporter that mediates the uptake of estrone sulfate. Inhibited by probenecid, propionate, 2-methylbutyrate, 3-methylbutyrate, benzoate, heptanoate and 2-ethylhaxanoate. May act as an odorant transporter. Highly expressed in olfactory mucosa. Weakly expressed in testis. Not detected in heart, spleen, lung, kidney or brain. Expressed at embryonic day 7, but not later in embryogenesis. Expressed in adult. Belongs to the major facilitator (TC 2.A.1) superfamily. Organic cation transporter (TC 2.A.1.19) family.