TABLE 2.

Specificity of spontaneous reversions formed in a double nth nei mutant lacking endo III and endo VIII

Strain	Reversion event	Lac+ revertants/109 cells (avg ± SD)		Approx fold increase
		Wild type	nth nei
CC101	A:T→C:G	1.1 ± 0.7	0.3 ± 0.1	<1
CC102	G:C→A:T	0.8 ± 0.3	34 ± 4.9	43
CC103	G:C→C:G	1.8 ± 0.8	0.6 ± 0.4	<1
CC104	G:C→T:A	1.8 ± 1.6	2.8 ± 0.8	1.5
CC105	A:T→T:A	1.2 ± 0.7	2.4 ± 1.4	2
CC106	A:T→G:C	0.5 ± 0.3	0.1 ± 0.1	<1