The putative Na⁺-independent organic solute transporter (takes up or stimulates uptake of p-amino hippurate (PAH) (K_m = 35.0 µM), tetraethylammonium (Km = 62 µM) and other organic solutes in frog oocytes). The protein exhibits one N-terminal TMS but is otherwise hydrophilic (Kobayashi et al., 2005).