Table 2.

Fluctuation test data (mean ± SEM) of the WT and 20 GATC viruses under stress.

Virus	Stress	Tests	N0	N1a × 10–6	P0	m × 106	µ × 106	r
WTb	None	15	211 ± 25	0.28 ± 0.05	0.52 ± 0.05	3.69 ± 1.03	1.58 ± 0.44	8.11 ± 0.29
WT	42°C	3	187 ± 22	5.18 ± 1.58	0.38 ± 0.11	2.10 ± 0.12	0.90 ± 0.06	3.81 ± 0.24
WTc	5-FU	6	273 ± 58	0.01 ± 0.00	0.53 ± 0.11	48.8 ± 9.45	20.9 ± 4.12	1.50 ± 0.11
20GATCa	None	3	320 ± 134	3.09 ± 1.03	0.29 ± 0.13	0.48 ± 0.04	0.21 ± 0.15	8.68 ± 0.29
20GATC	42°C	3	133 ± 19	0.38 ± 0.15	0.71 ± 0.13	9.79 ± 1.81	3.72 ± 0.69	2.23 ± 0.19
20GATC	5-FU	3	109 ± 36	0.03 ± 0.03	0.60 ± 0.28	59.5 ± 30.8	25.5 ± 13.2	1.57 ± 0.33

^aCorrected for differences in plating efficiency at 42°C and 5-FU (see Materials and Methods).

^bFrom Table 1.

^cFrom a previous work (see Materials and Methods).