CGSC Strain#: 5162
Strain Designation: D21f2     
Source of Strain: H.G. Boman
Sex: F-
Chromosomal Markers: proA23,
lac-28,
tsx-81,
trp-30,
his-51,
rpsL173(strR)
,
rfa-1,
rfa-31,
ampCp-1Strain 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
- rfa-1 was formerly called lpsA1
- rfa-31 was formerly called lpsD31
- strR = streptomycin resist.
References: - Boman, HG, K Nordstrom, S Normark 1974. Penicillin resistance in Escherichia coli K12: synergism between penicillinases and a barrier in the outer part of the envelope. Ann. N. Y. Acad. Sci. 235(0):569-86.
- Havekes, L, J Tommassen, W Hoekstra, B Lugtenberg 1977. Isolation and characterization of Escherichia coli K-12 F- mutants defective in conjugation with an I-type donor. J. Bacteriol. 129(1):1-8.