CGSC Strain#: 14175
Strain Designation: BL21(DE3)/pKD46     
Source of Strain: Sex: F-
Episome/Plasmid: pKD46
Plasmid Markers/Mutations: repA101(ts)
,
araBp-gam-bet-exo,
oriR101,
bla(ApR)
,
araC ,
bla ,
[tL3] Plasmid Comment: Lambda Red recombinase expression plasmid -- includes 2154 nucleotides (31088-33241) of phage Lambda, which includes the terminator downstream frp, exo, tL3 and a small ORF.GenBk-AY048746
Chromosomal Markers: lon-11,
Δ(ompT-nfrA)885,
Δ(galM-ybhJ)884,
λDE3 [lacI, lacUV5-T7 gene 1, ind1, sam7, nin5],
Δ46,
[mal+]K-12(λ
S)
,
hsdS10Strain Comments: - This strain should be grown on rich media with ampicillin (100 ug/ml at 30 C).
- lon-11-- is a mutation of an E. coli B gene caused by an IS186 insertion in the promoter. All derivatives of Witkin's B wildtype carry this lon mutation.
- Δ(ompT-nfrA)885-- This deletions actually spans from distal region of the DLP12 prophage to an Rhs element just downstream of nfrA in the E. coli B genome. Actual genes deleted are appY, ompT, envY, ybcH, and nfrA.
- Δ(galM-ybhJ)884-- Deletion from base 769,048 to 786,294 in the REL606 genome and includes the following genes: galMKTE, modFE, acrZ, modABC, ybhA, pgl, ybhD, ybhH, ybhI, and ybhJ
- λDE3 [lacI, lacUV5-T7 gene 1, ind1, sam7, nin5]-- Lambda DE3 has the phage T7 RNA polymerase under the control of the lacUV5 promoter inserted into the BamHI site of the Lambda cloning vector D69.
- Δ46-- : cured of defective P2-like prophage found in wildtype E.coli B.
- [mal+]K-12(λS)-- The malK, lamB, malM region was transduced in from E. coli K-12.
- Δ(galM-ybhJ)884 was formerly called
- LamS = Lambda sensitive
- ApR = ampicillin resistant
- ts = Temperature Sensitive
References: - Wood, W.B. 1966. Host specificity of DNA produced by Escherichia coli: bacterial mutations affecting the restriction and modification of DNA. J.Mol.Biol. 16:118-133
- Datsenko, KA, BL Wanner 2000. One-step inactivation of chromosomal genes in Escherichia coli K-12 using PCR products. Proc. Natl. Acad. Sci. U.S.A. 97(12):6640-5.