Low UBB+1 expression extends ATG1-dependent CLS. (A) Survival of the L-UBB+1 strain during stationary phase under wild type background and atg1Δ mutant background. Viability was determined by CFU counting. (B) Percentages of dead cells are shown as the fraction of propidium iodine (PI) positive cells. The data are shown as mean ± SD from biological duplicates. *p < 0.01.