Phenotypes of C9-2 (het-cPA), C2-2-9 (het-cOR), and FGSC2193 (het-cGR) transformants containing het-cPA, het-cOR, po1, pd2, and pd3 constructs observed after 1 day of growth. Hyphae were treated with the vital dye Evan's blue (16), which stains dead hyphal compartments. Magnification, ×64.