Table 2.

Survival rates of yeast strains grown under different oxidative stress conditions

Treatment	T50, h			−Δ% survival per h
	NM	WT	OP	NM	WT	OP
H2O2	3.5	6.3	6.9	14.3	7.9	7.2
Paraquat	8.1	16.5	17.6	6.2	3.0	2.8
AAPH	11.0	20.2	21.3	4.5	2.5	2.3

The same amount of cells of each strain from late log phase was diluted 1:100 into a buffer containing PBS, 2% glucose, and 0.17 mM methionine in the presence or absence of H₂O₂ (2 mM). At each time point, an aliquot from each culture was taken and plated on minimal medium plates without leucine and the colonies were counted. Each survival rate point represents the number of colonies grown when H₂O₂ was present in relation to the number of colonies observed when growth was performed without H₂O₂ in the medium. Wild-type parental strain (WT). msrA null mutant strain (NM). Overproducer strain (OP). T₅₀ is defined as the incubation time (hours) in culture needed to achieve 50% killing.