TABLE 5.

Effect of the rad52 group mutations on Y′ BIR^a

Relevant genotype	BIR frequency (10−2)	Frequency relative to wild type
RAD	63 ± 17	100
rad52	0.015 ± 0.015	0.024
rad51	2.7 ± 1.2	4.3
rad59	70 ± 25	111
rad51 rad59	2.1 ± 0.5	3.3
rad50	93 ± 27	148
rad50 rad51	5.4 ± 0.75	8.6
rad50 rad59	158 ± 74	251
rad50 rad51 rad59	2.6 ± 1.4	4.1

^aBIR frequencies were determined from the number of Ura⁺ transformants containing linear chromosome fragments (see Materials and Methods).