proton-dependent oligopeptide transport (POT) family protein. similar to ATPTR2-B (NITRATE TRANSPORTER 1), transporter [Arabidopsis thaliana] (TAIR:AT2G02040.1); similar to proton-dependent oligopeptide transport (POT) family protein [Arabidopsis thaliana] (TAIR:AT1G62200.1); similar to LeOPT1 [Lycopersicon esculentum] (GB:AAD01600.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO42444.1); similar to peptide transporter 1 [Vicia faba] (GB:AAP44102.1); contains InterPro domain TGF-beta receptor, type I/II extracellular region; (InterPro:IPR000109); contains InterPro domain MFS general substrate transporter (InterPro:IPR016196)