TABLE 4.

uvrD252 does not suppress the rep recBC(Ts) lethality at high temperature

Strain	Mutant genotype	Plating efficiency ata:
		37°C	42°C
JJC505	recBC(Ts) Δrep	<10−6	<10−6
JJC2540	recBC(Ts) uvrD252	1.24 ± 0.09	1.12 ± 0.46
JJC4571	recBC(Ts) Δrep uvrD252	<10−6	<10−6

^aOvernight cultures grown at 25°C were plated at 25°C and 37°C or 42°C. For each culture, the ratio of clones obtained at 37°C or 42°C to those obtained at 30°C was calculated, and the results are expressed as the averages of the ratios.