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 (By similarity). Belongs to the major facilitator (TC 2.A.1) superfamily. Organic cation transporter (TC 2.A.1.19) family.