Efflux pump; part of the gene cluster that mediates the biosynthesis of dothistromin (DOTH), a polyketide toxin very similar in structure to the aflatoxin precursor, versicolorin B (PubMed:12039746, PubMed:17683963). One function of dotC may be to transport early-stage dothistromin biosynthetic intermediates from the cytoplasm into vacuoles, thereby affecting the rate of dothistromin production (PubMed:22069539). Expression is positively regulated by the dothistromin-specific transcription factor aflR (PubMed:23207690). Decreases the expression of ver1, pksA and vbsA, and subsequent production of dothistromin, but does not affect the resistance to the toxin (PubMed:22069539). Belongs to the major facilitator superfamily. TCR/Tet family.