Table 1.

Comparison of site-specific recombination systems in filamentous phages.

Phage	Recombinase	Target sequence attP	Host	Reference
CTXϕ	XerC/XerD	dif	Vibrio cholerae	Huber and Waldor (2002)
ϕRSM	Resolvase/Invertase	Ser tRNA (3′-13 bp)	Ralstonia solanacearum	Askora et al. (2009)
Nf	Transposase	20-bp inverted repeat (dRS3)	Neisseria sp.	Kawai et al. (2005)
Pf4	Tyrosine recombinase	Gly tRNA (3′-27 bp)	Pseudomonas aeruginosa	Webb et al. (2004)
ϕRSS1	XerC/XerD	dif	R. solanacearum	Yamada (2013)
XacF1	XerC/XerD	dif	Xanthomonas campestris	Ahmad et al. (2014)