Table 2.

Relative increment in the amount of DNA in nrdA⁺ and nrdA101 strains and recA derivatives after 4 h of rifampin addition at 30°C or 42°C and after incubation at 42°C in the absence of the drug

Strain genotype	Relative increase DNA (%) under the indicated conditiona
	+ Rif at 30°C	+ Rif at 42°C	− Rif at 42°C
nrdA+	52	55
nrdA+recA	36	47
nrdA101	90	90	48
nrdA101 recA	41	5	45

^aValues are based on ΔG. The presence (+ Rif) and absence (− Rif) of rifampin is indicated.