CGSC Strain#: 805
Strain Designation: W3140     
Source of Strain: J. Lederberg
Sex: Hfr
Point of Origin#: 2A
Map Position: 12.20
Direction of Marker Transfer: Counterclockwise
Chromosomal Markers: ΔlacZ39,
relA1,
rpsL45(strR)
,
spoT1,
metB1Strain Comments: - (Ullmann et al. refer to lacZ39 in Fig. 1 of their paper as "4680".)
- lacZ39 is a deletion of ca. 1/3 of the lacZ gene.
- ΔlacZ39-- is a deletion of ca. 1/3 of the lacZ gene.
- spoT1-- In addition to the 6bp insertion, there is a C to T transition resulting in an H257Y substitution.
- strR = streptomycin resist.
References: - Cook, A., J. Lederberg 1962. Recombination studies of lactose nonfermenting mutants of Escherichia coli K12. Genetics 47:1335-1353