proton-dependent oligopeptide transport (POT) family protein. similar to ATNRT1:2 (NITRATE TRANSPORTER 1:2), calcium ion binding / transporter [Arabidopsis thaliana] (TAIR:AT1G69850.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO62503.1); contains InterPro domain TGF-beta receptor, type I/II extracellular region; (InterPro:IPR000109); contains InterPro domain MFS general substrate transporter (InterPro:IPR016196)