TABLE 2.

sif alleles

sif allele	Gene homologa	Predicted function or property	% amino acid identity/ source of homologb	In vivo fold enrichmentc
sif1	sitC	29-kDa ABC transporter component	37/S. epidermidis	3.5*
sif2	lepA	Membrane-bound GTPase	80/E. coli	3.9*
sif3	rffG	LPS biosynthesis	76/Erwinia carotovora	22*
sif4	frdB	Fumarate reductase subunit	84/Proteus vulgaris	ND
sif5	metL	Apartokinase/homoserine reductase	80/E. coli	ND
sif6	yohI	Putative transcriptional regulator	91/E. coli	28*
sif8	bioH	Biotin synthesis	82/E. coli	ND
sif9	fyuA	Iron siderophore precursor	100/Y. enterocolitica	ND
sif10	manB	O-antigen biosynthesis	100/Y. enterocolitica	ND
sif11	yjcD	45.7-kDa protein in soxR-acs region	78/E. coli	35
sif13	nifJ	Pyruvate-flavodoxin oxidoreductase	70/B. subtilis	ND
sif14	rhlB	RNA helicase	68/E. coli	ND
sif15	HP0694	Putative outer membrane protein	69/Salmonella	30*
sif16	gacA	Transcriptional regulator	32/P. syringae	6.0*
sif12	Unknown ORF	No homology		ND
sif18	Unknown ORF	Near yjgF homolog		4.5
sif20	Unknown ORF	Near cbiO homolog		35*
sif21	Unknown ORF	No homology		21
sif23	Unknown ORF	No homology		4.2
sif25	Unknown ORF	No homology		31*
sif29	Unknown ORF	No homology		46*
sif31	Unknown ORF	near polI homolog		ND

^aUnknown ORF, the open reading frame (ORF) responsible for cat expression was not identified from the sequence data obtained. 

^bThe percent amino acid identity was determined for partial protein sequences only. 

^cND, not determined. Values marked with an asterisk were determined in at least two separate experiments with similar results. The data shown are one representative data set.