CGSC Strain#: 4290
Strain Designation: KL19      Source of Strain: M.C. Cappello
Sex: Hfr    Point of Origin#: 67   Map Position: 22.01   Direction of Marker Transfer: Clockwise
Chromosomal Markers: Strain Comments:

• No markers--strain is prototrophic and LAM⁺. This strain gives a negative MS-2 test, even though it is Hfr.

References:

• Low, K.B. 1968. Formation of merodiploids in matings with a class of Rec- recipient strains of Escherichia coli K12. Proc.Natl.Acad.Sci.USA 60:160-167