Efflux pump; part of the gene cluster that mediates the biosynthesis of asperlin, a polyketide showing anti-inflammatory, antitumor and antibiotic activities (PubMed:30339758). Is probably involved in the efflux of asperlin (Probable). Expression is controlled by the asperlin biosynthesis cluster-specific transcription factor alnR. Strongly diminishes the production of asperlin. Belongs to the major facilitator superfamily. TCR/Tet family.