A transporter able to export peptides and flavins. When overexpressed allows cells deleted for multiple peptidases (pepA, pepB, pepD and pepN) to grow in the presence of dipeptides Ala-Gln or Gly-Tyr which otherwise inhibit growth (PubMed:20067529). Cells overexpressing this protein have decreased intracellular levels of Ala-Gln dipeptide, and in a system that produces the Ala-Gln dipeptide, overproduction of this protein increases its export (PubMed:20067529). When overexpressed increases secretion of FMN and FAD but not riboflavin; intracellular concentrations of FMN and riboflavin rise, possibly to compensate for increased secretion (PubMed:25482085). Increased overexpression causes slight cell elongation (PubMed:25482085). Belongs to the multi antimicrobial extrusion (MATE) (TC 2.A.66.1) family. Truncated N-terminus.