CGSC Strain#: 5170
Strain Designation: G11h5     
Source of Strain: H.G. Boman
Sex: Hfr
Point of Origin#: 2A
Map Position: 12.20
Direction of Marker Transfer: Counterclockwise
Chromosomal Markers: relA1,
ilv-299,
metB1,
ampCp-1Strain Comments: - "Unknown mutation" confers resistance to 50 mg/ml ampicillin; not yet mapped.
- 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: - Boman, HG, KG Eriksson-Grennberg, S Normark, E Matsson 1968. Resistance of Escherichia coli to penicillins. IV. Genetic study of mutants resistant to D,L-ampicillin concentrations o 100 mu-g-ml. Genet. Res. 12(2):169-85.