Efflux pump; part of the gene cluster that mediates the biosynthesis of the mycotoxin fusarin C (PubMed:23932525). Within the cluster, FUS1, FUS2, FUS8 and FUS9 are sufficient for fusarin production (PubMed:23932525). The other FUS cluster members are not essential for fusarin C biosynthesis (PubMed:23932525). Expressed under high amounts of nitrogen via regulation by GLN1 (PubMed:23932525). Moreover, components of the fungal-specific velvet complex VEL1, VEL2 and LAE1 act also as positive regulators of expression (PubMed:20572938, PubMed:23932525). Finally, expression is induced under acidic conditions in a PACC-independent manner (PubMed:23932525). Does not alter fusarin C production (PubMed:23932525). Belongs to the major facilitator superfamily. TCR/Tet family.