Table 3.

Generation of deletions in the emr1 gene by TnCR1 and TnCR2

	Deletion generated
	2.5 kb deletion	4.5 kb deletion
Frequency of ideal TnCR1 position by PCR	4/95	2/95
Frequency of ideal TnCR2 position by PCR	2/30	1/160
Efficiency of recombination in E.coli expressing Cre	5/5	10/10
Efficiency of recombination by Cre recombinase	12/18	4/10