E. coli Genetic Resources at Yale
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Strain Ra-1

• CGSC#: 4232
• Strain Designation

  Designation	Source	Preference
  Ra-1	Cappello M.C.	1

  
  
• Sex(Hfr,F+,F-,or F'): Hfr
• Hfr Point of Origin#: 52
• PO Map Position: 65.00
• Direction of Marker Transfer: Clockwise
• 4 Mutations:

  Mutation	Location	Certainty	Display
  glnV42(AS)	14.99	1	glnV42(AS)
  LAM-	17.40	1	λ-
  malB28(LamR)	92.00	1	malB28(λR)
  LAMR	1000.00	1	λR

  
  
• Comments:
  • In Lyophil Only
  • This strain also carries the sex factor attachment site at the point of origin of strain Ra-2. This property is designated sfa-5.
• References:
  • Joset, F., B. Low, R. Krisch 1964. Induction by radiation of a new direction of chromosome transfer during conjugation in an Hfr strain of Escherichia coli. Biochem.Biophys.Res.Commun. 17:742-747
  • Low, K.B. 1967. Inversion of transfer modes and sex factor-chromosome interactions in conjugation in Escherichia coli. J.Bacteriol. 93:98-106
  
  

  Printable Strain Report