(D) WT and atg1Δ cells were transferred to SD-N +50 mM MES-KOH (pH 6.2) with 10 mM NAC for the indicated time. Cell viability was determined by phloxine B staining. Cells from these cultures were plated on YEPD agar and overlaid with TTC agar to examine respiratory competency. The black and gray areas indicate the percentage of viable cells that are respiratory competent or respiratory deficient, respectively. These data represent the average of three independent experiments and bars indicate standard deviations 