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

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Strain E. coli B/r

• CGSC#: 2511
• Strain Designation

  Designation	Source	Preference
  E. coli B/r	Witkin E.M.	1

  
  
• Sex(Hfr,F+,F-,or F'): F-
• 4 Mutations:

  Mutation	Location	Certainty	Display
  lon-	9.90	1	lon-
  sulA1	21.98	1	sulA1
  Mal(ts)	1000.00	1	Mal(ts)
  LAMR	1000.00	1	λR

  
  
• Comments:
  • Several persons may have isolated radiation-resistant derivatives of E. coli B and called them simply " E. coli B/r." This designation should be reserved for the original isolate of Witkin.
  • Use #6573 from Witkin.
• References:
  • Witkin, EM 1946. Inherited Differences in Sensitivity to Radiation in Escherichia Coli. Proc. Natl. Acad. Sci. U.S.A. 32(3):59-68.
  
  

  To request this strain visit the ECGRC website.

  
  

  Printable Strain Report