Expressed in roots, flowers and siliques. Detected in stems and leaves. Belongs to the major facilitator superfamily. Proton-dependent oligopeptide transporter (POT/PTR) (TC 2.A.17) family. The predicted gene At1g72120 has been split into 2 genes: At1g72120 and At1g72115. Chimeric cDNA. Its 3'- and 5'-sequences are derived from the gene At4g26240.