Table 1.

Primers used in this study. The recognition sites for restriction enzymes are underlined.

Primers	Sequence (5′–3′)	Restriction Site
rfaD-U-F	CCGCTCGAGTCCGTTACACCTTCAGCA	XhoI
rfaD-U-R	CGGAATTCGTGGCTGATGTGAATCTGTGGT	EcoRI
rfaD-D-F	CCCAAGCTTTACTTGCCGTCCCACTCG	HindIII
rfaD-D-R	AAAACTGCAGGCTTTATCGGCAGCAACA	PstI
kan-FRT-F	CGGAATTCGTGTAGGCTGGAGCTGCTTCG	EcoRI
kan-FRT-R	CCCAAGCTTGCCATTAATTCACTGATCAG	HindIII