NAP1, SWR1, and SWC2, but not CHZ1, exhibit genetic interactions with HTZ1. Strains of the indicated genotype were grown to logarithmic phase, equalized, and spotted as 10-fold serial dilutions onto CSM, CSM lacking inositol (CSM –INO), or CSM containing 2% galactose as the sole carbon source (CSM GAL) and grown at 30°C for 3 days.