CGSC Strain#: 5169
Strain Designation: G11el      Source of Strain: H.G. Boman
Sex: Hfr    Point of Origin#: 2A   Map Position: 12.20   Direction of Marker Transfer: Counterclockwise
Chromosomal Markers: tolD4, relA1, ilv-299, metB1, ampCp-1
Strain Comments:

• ampCp-1-- is a promoter mutation; AmpC⁺ strains carrying this allele produce about 10X the amount of beta lactamase found in wild-type strains. In absence of other amp alleles, use 10-15 ug/ml Amp.
• ampCp-1 was formerly called ampA1

References:

• Eriksson-Grennberg, K.G., H.G. Boman, J.A.T. Jansson, S. Thoren 1965. Resistance of Escherichia coli to penicillins. I. Genetic study of some ampicillin mutants. J.Bacteriol. 90:54-62