CGSC Strain#: 4345
Strain Designation: KL334      Source of Strain: M.C. Cappello
Sex: Hfr    Point of Origin#: 2A   Map Position: 12.20   Direction of Marker Transfer: Counterclockwise
Chromosomal Markers: lacZ118(Oc), lacI22, λ^-, lysA23
Strain Comments:

• lacI22 is Paris allele lac;₃.
• lacZ118(Oc)-- is the lacZ allele originating in Paris strain Hfr 3000 U118. It is an ochre mutation.
• lacI22 was formerly called lacI3
• lacI22 was formerly called lac_i3^-
• Oc = ochre(UAA) mutation

References:

• Birge, EA, KB Low 1974. Detection of transcribable recombination products following conjugation in rec+, reCB- and recC-strains of Escherichia coli K12. J. Mol. Biol. 83(4):447-57.