CGSC Strain#: 4240
Strain Designation: KL983      Source of Strain: M.C. Cappello
Sex: Hfr    Point of Origin#: 53   Map Position: 53.80   Direction of Marker Transfer: Counterclockwise
Chromosomal Markers: lacY1, λ^-, xyl-7, mglP1
Strain Comments:

• This F insertion is rather unstable, giving rise to F⁺ strains due to excision of the F. This strain is suppressor-free.
• xyl-7 was formerly called xylA7

References:

• Low, K.B. 1973. Rapid mapping of conditional and auxotrophic mutants of Escherichia coli K-12. J.Bacteriol. 113:798-812