Figure 7.
Life-span determination. Survival curves for the control strain [YPK9 containing the empty vector (circles)], the strain carrying the plasmid with LAG1Sc expressed from its own promoter (triangles), and the strain carrying the plasmid with LAG1Hsexpressed from the LAG1Sc promoter (squares) are shown. There is no significant difference between the life spans of the first two strains (P = 0.13). The life spans of the first and third strains (P = 0.001) and those of the second and third strains (P = 0.02) differ. The mean life spans were 21.4, 19.3, and 16.4 generations for these three strains, respectively.
