Dose-response curves for FLU alone (diamond) and in combination with 13 µM 1 (circle), 13 µM 2 (triangle), or 25 µM beauvericin (square), in the null pump (A), CDR1 (B), and MDR1 (C) S. cerevisiae strains and for FLU alone (diamond) and in combination with 189 µM 1 (circle), 194 µM 2 (triangle), or 5.7 µM beauvericin (square) in C. albicans isolates 1587 (FLU-susceptible) (D) and 1758 (FLU-resistant via MDR1 efflux pumps) (E).