All C. albicans strains were archived in 25% glycerol and stored at −80 °C. Strains were grown in YPD (1% yeast extract, 2% bactopeptone, and 2% glucose) at 30 °C unless otherwise specified. For solid media, 2% agar was added. Strains were constructed according to standard protocols. Strains used in this study are listed in Supplementary Table 1. Caspofungin was generously provided by Terry Roemer (Department of Infectious Diseases, Merck Research Laboratories) and was diluted to a 100 µg/ml stock, and used at a final concentration of 125 ng/ml. Doxycycline (DOX, BD Biosciences #631311) was formulated in a 20 mg/ml stock in water and used at a final concentration of 0.02 µg/ml or 1 µg/ml, as specified.