E. coli Genetic Resources at Yale
CGSC, The Coli Genetic Stock Center

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Strain W1957

• CGSC#: 4476
• Strain Designation

  Designation	Source	Preference
  W1957	Lederberg J.	1

  
  
• Sex(Hfr,F+,F-,or F'): Hfr
• Hfr Point of Origin#: 2A
• PO Map Position: 12.20
• Direction of Marker Transfer: Counterclockwise
• 4 Mutations:

  Mutation	Location	Certainty	Display
  fhuA66	3.61	1	fhuA66
  relA1	62.71	1	relA1
  spoT1	82.34	1	spoT1
  metB1	88.94	1	metB1

  
  
• Comments:
  • This is a T₁^R of the Cavalli Hfr.
• 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
  
  

  Printable Strain Report