CGSC Strain#: 5120
Strain Designation: W1655, LAMR     
Source of Strain: Sex: F+
Episome/Plasmid: F1-2
Plasmid Markers/Mutations: ΔDEL33-43 Chromosomal Markers: λ-,
relA1,
spoT1,
metB1,
λRStrain Comments: - F1-2 is an F factor with a 33-43 kb deletion.
- spoT1-- In addition to the 6bp insertion, there is a C to T transition resulting in an H257Y substitution.
- λR-- Lambda resistant, locus unknown.
References: - Broda, P. 1967. The formation of Hfr strains in Escherichia coli K12. Genet.Res. 9:35-47
- Anthony, WM, RC Deonier, HJ Lee, S Hu, E Otsubo, N Davidson, P Broda 1974. Electron microscope heteroduplex studies of sequence relations among plasmids of Escherichia coli. IX. Note on the deletion mutant of F, F delta(33-43). J. Mol. Biol. 89(4):647-50.