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

About the CGSC

• CGSC Home
• Scope of the Collection

Searching the CGSC Database

• Help With Query Forms
• Strain Query
• Mutation Query
• Gene/Site Query
• Gene Product Query
• Reference Query
• Query Help
• Info on Genetic Nomenclature

How to Request Strains or Information

• Reviving Strains
• Contact Information

Strain JF238

• CGSC#: 6053
• Strain Designation

  Designation	Source	Preference
  JF238	Felton J.	1

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

  Mutation	Location	Certainty	Display
  ara-55	1.40	1	ara-55
  DE(codB-lacI)3	7.60	1	Δ(codB-lacI)3
  LAM-	17.40	1	λ-
  gyrA91(NalR)	50.33	1	gyrA91(NalR)
  relA1	62.71	0	relA1
  spoT1	82.34	0	spoT1
  asnA31	84.60	1	asnA31
  thiE1	90.34	1	thiE1

  
  
• Comments:
• References:
  • Felton, J, S Michaelis, A Wright 1980. Mutations in two unlinked genes are required to produce asparagine auxotrophy in Escherichia coli. J. Bacteriol. 142(1):221-8.
  
  

  Printable Strain Report