Table 1.: Bacterial Strains and Plasmids Used in this Study

Strain and Plasmid Deskription Reference
E. coli strains    
i484 O25:H autoagglutinating, human isolate 17
oy077 i484, fitR :: EZ-TN5< Kan-2 > This study
oy016 i484, lacZ :: EZ-TN5< DHFR-1 > This study
oy021 oy016 carrying pMP-fitB This study
oy022 oy016 carrying pMP-fitA This study
oy026 oy016, fitR :: EZ-TN5< Kan-2> This study
oy028 oy026 carrying pMP-fitB This study
oy029 oy026 carrying pMP-fitA This study
oy071 i484, fur :: EZ-TN5 <DHFR> This study
oy078 oy077, fur :: EZ-TN5<DHFR> This study
DH5α F–, ф80d lacZ∆M15 ∆ (lacZYA–argF) U169, endA1, recA1, hsdS17 (rK–mK+), deoR, thi–1, supE44, λ–, gyrA96, relA1 Invitrogen
     
Plasmids    
pMP220 Contains a promoterless lacZ gene, Tetr 19
pMP–fitA fit promoter was cloned into pMP220 with a direction of fitA transcription 2
pMP–fitB fit promoter was cloned into pMP220 with a direction of fitB transcription 2
pBAD22 overexpression vector, Ampr 8
pBAD–fitR1 DNA fitR1 cloned into pBAD22 at EcoR I and Hind III sites This study
pBAD–fitR2 DNAfitR2 cloned into pBAD22 at EcoR I and Hind III sites This study
pCR Cloning vector pCR-XL-TOPO invitrogen
pCR64 DNA fitR1 cloned into pCR-XL-TOPO This study