Table 5. Recombination frequencies with linear pJA2 in E. coli mutant derivatives.

MAC1306 Donor×Recipient strain	Relevant genotype of recipient	Nb of expe-riments	Av. LacZ+CmR/recipient	Fold, relative to WT(1)	Frequency LacZ −CmR/recipient(2)	Fold, relative to WT	Proportion of HFIR events among LacZ−
JAC7	WT	31	4.2 (+/−3.4)×10−6	1	4.1×10−9	1	4/60
MAC1348	recA	12	1.3 (+/−0.8)×10−8	0.003 **	<8.7×10−10	<0.21	NA
MAC1397	recB	12	7.0 (+/−7.0)×10−7	0.17 **	<2.1×10−9	<0.26	NA
MAC1473	recF	12	1.1 (+/−0.6)×10−6	0.26 **	1.8×10−9	0.31	1/9
MAC1357	ruvA	12	2.5 (+/−2.8)×10−5	5.8 *	1.1×10−8	1.90	0/9
MAC1479	recG	12	7.5 (+/−6.3)×10−7	0.18 **	1.5×10−9	0.26	0/2
MAC1352	recD	15	1.8 (+/−1.0)×10−5	4.2 **	4.4×10−10	0.07	0/3
MAC1350	recJ	12	3.7 (+/−2.6)×10−6	0.87	6.2×10−9	1.51	0/22

⁽¹⁾*Significant below 5%, ** Significant below1% with a Student test.

⁽²⁾Frequencies calculated with the first term of a Poisson law.