CGSC Strain#: 4476
Strain Designation: W1957     
Source of Strain: J. Lederberg
Sex: Hfr
Point of Origin#: 2A
Map Position: 12.20
Direction of Marker Transfer: Counterclockwise
Chromosomal Markers: fhuA66,
relA1,
spoT1,
metB1Strain Comments: - This is a T1R of the Cavalli Hfr.
- spoT1-- In addition to the 6bp insertion, there is a C to T transition resulting in an H257Y substitution.
References: - Campbell, A. 1965. The steric effect in lysogenization by bacteriophage lambda. I. Lysogenization of a partially diploid strain of Escherichia coli K12. Virology 27:329-339
- Del Campillo-Campbell, A, G Kayajanian, A Campbell, S Adhya 1967. Biotin-requiring mutants of Escherichia coli K-12. J. Bacteriol. 94(6):2065-6.
- Adhya, S., P.P. Cleary, A. Campbell 1968. A deletion analysis of prophage lambda and adjacent genetic regions. Proc.Natl.Acad.Sci.USA 61:956-962
- Cleary, P.P., A. Campbell 1972. Deletion and complementation analysis of the biotin gene cluster of Escherichia coli. J.Bacteriol. 112:830-839