Growth inhibition, as measured by OD600 readings after 48 h in YPD medium at 30 °C of C. albicans that had been previously exposed for 1.5 h to: a) increasing concentrations of Hist-5 alone or in combination with CuSO4, FeCl3, BCS, or EDTA at indicated concentrations. Supplemental Cu enhanced the antifungal activity of Hist-5, whereas Fe(III) and metal chelators (BCS, EDTA) decreased it. b) Contrasting effects of supplemental Cu(II) and Fe(III) on C. albicans % Growth upon 6.2 µM Hist-5 treatment are apparent at low µM concentrations.