Table 2.

Integration compatibility of CTXφ attP(+) sites and of dif sites

Phage machinery	attP	dif	% integration	Screened colonies
El Tor	mutCl	dif1*	<0.1	1256
El Tor	mutCl	dif2†	30.4	1449
El Tor	El Tor	difG*	<0.1	1335
Classical	Classical	difG*	<0.1	1399
El Tor	G	difG*	1.1	2110
El Tor	G	dif1*	<0.3	307
El Tor	G	dif2†	<0.4	271

Data were obtained from at least three independent experiments.

*On chromosome 1.

^†On chromosome 2.