**Figure 1.** **The long-lived mutant strains 3, 5 and 12 do not differ from the parental WT strain in the exponential growth rates and post-exponential growth efficacies in medium initially containing fermentable or non-fermentable carbon source.** The parental haploid WT strain BY4742, long-lived mutant strains 3, 5 and 12 (each in the BY4742 genetic background), and the single-gene-deletion mutant strains *rpp2BΔ* and *dbp3Δ* (each in the BY4742 genetic background) were cultured in YP medium initially containing 0.2% glucose (**A**), 2.0% glucose (**B**), 1.0% ethanol (**C**) or 3.0% glycerol (**D**). The OD_{600} of cell cultures recovered at different time points was measured. Growth curves are shown; data for growth curves are presented as means (n = 3). For each strain, a doubling time (min) was calculated as T_{d} = (t_{2} – t_{1}) × log 2/log (OD_{2}/OD_{1}), where: t_{2} = a given time point; t_{1} = an earlier time point; OD_{2} = OD_{600} at a given time point; OD_{1} = OD_{600} at an earlier time point. Data for the values of T_{d} are presented as means ± SEM (n = 3; ns, not significant; **p* < 0.05; **p < 0.01; ****p* < 0.001).