Products Competent Cells & Strains
Library Efficiency® DH5α™ Competent Cells are a versatile strain of chemically competent cells that demonstrate transformation efficiencies of >1 x 10 8 cfu/ µg plasmid DNA. Library Efficiency® DH5α™ Competent Cells are ideal for difficult cloning constructions or any application that uses limiting amounts of DNA. Supports blue/white screening by α-complementation on plates containing X-Gal or Bluo-Gal Maintains plasmid DNA with minimum recombination events Delivers high yield plasmid preparations for downstream applications M13mp cloning vectors may be propagated on a lawn of DH5α-FT™ , DH5αF...
Catalog: 18263-012
Size: 1 ml
Size: 1 ml
MAX Efficiency® Stbl2™ Competent Cells are high-efficiency chemically competent cells specifically designed for cloning unstable inserts. In addition to rec A1, a unique set of genetic markers allow for stable cloning of direct repeat and retroviral sequences (1) and tandem array genes (2). MAX Efficiency® Stbl2™ Competent Cells offer: >1 x 10 9 transformants/flg for cloning rare sequences Elimination of mcr BC- hsd RMS- mrr and mutation of mcr A allows cloning of methylated genomic sequences (1) Unique genotype stabilizes direct repeat and retroviral sequences such as SIV and HIV (1) Greatly ...
Catalog: 10268-019
Size: 1 ml
Size: 1 ml
MAX Efficiency® DH10Bac™ Competent Cells are used for production of recombinant bacmids used in the Bac-to-Bac® Baculovirus Expression System . The DH10Bac™ E. coli strain contains a baculovirus shuttle vector (bacmid) that can recombine with a donor plasmid, pFastBac™, to create an expression bacmid containing a cloned gene of interest. Features of MAX Efficiency® DH10Bac™ Competent Cells include: • Consistent yields of >1 × 10 8 transformants/ µg • Tolerance of small amounts of undiluted ligation reactions • Support of efficient blue/white colony screening (Φ80 lac ZΔM15 marker) About MAX Ef...
Catalog: 10361-012
Size: 5 × 100 µl
Size: 5 × 100 µl
One Shot® ccd B Survival™ 2 T1 Phage-Resistant (T1 R ) chemically competent E. coli are suitable for the propagation of plasmids containing the ccd B gene, and are designed for use with the Gateway® Vector Conversion System and for propagating Gateway® destination, donor, and super-coiled entry vectors. Transformation efficiency is >1 × 10 9 transformants/ µg DNA. The ccd B Survival™ 2 T1 R E. coli strain is derived from the TOP10 strain. The ccdB Survival™ 2 T1 R E. coli strain offers the following Features: • Resistance to the ccd B gene product • Resistance to T1 and T5 phage (the ton A/ fh...
Catalog: A10460
Size: 10 transformations
Size: 10 transformations
The PichiaPink™ Expression Strain Set contains the 4 Pichia pastoris strains for use with the PichiaPink™ Expression System Kits. Each strain comes as a frozen stock in YPD media with 15% glycerol. All PichiaPink™ strains have the ade2 deletion. 3 strains have deletions of two protease genes, PEP4 and PRB1 . You can use the PichiaPink™ Expression Strain Set to refill your PichiaPink™ Yeast Expression System Kits. The PichiaPink™ Expression Strain Set includes the following Pichia strains: • PichiaPink™ Strain 1: ade2 • PichiaPink™ Strain 2: ade2 , pep4 • PichiaPink™ Strain 3: ade2 , prb1 • Pic...
Catalog: A11154
Size: 4 × 1ml
Size: 4 × 1ml
ElectroMAX™ DH10B™ T1 Phage-Resistant electrocompetent E. coli cells offer transformation efficiencies that are among the highest achieved by any product offered by Life Technologies, and can exceed 1 x 10 10 cfu/ µg plasmid DNA in efficiency. They are ideal for applications requiring high efficiency transformation, including cDNA and gDNA library construction. • Maximizes yield of transformants from limited cloning products • Permits efficient cloning of methylated DNA • Resistant to T1 and T5 bacteriophages • Supports blue/white screening by α-complementation on plates containing X-Gal or Bl...
Catalog: 12033-015
Size: 0.5 ml
Size: 0.5 ml
The Echo™ Cloning System is a two-vector system that utilizes the Cre-lox site-specific recombination system of bacteriophage P1 (1,2) for rapid cloning into multiple vectors. Your gene of interest is cloned into one of the specially designed donor vectors which can then be recombined with as many different Echo™ acceptor vectors as desired. The donor and acceptor vectors are placed in a buffer that contains Cre recombinase for a 25-minute, in vitro recombination reaction. Cre binds to the lox site present on each vector, brings them together, then cleaves and covalently reattaches the DNA str...
Catalog: C1010-10
Size: 10 reactions
Size: 10 reactions
BL21(DE3) E. coli are ideal for use with bacteriophage T7 promoter-based expression systems ( e.g. , pRSET, pCR¤T7, and pET). BL21(DE3) carry the lambda DE3 lysogen. Recombinant proteins that are non-toxic to E. coli are generally expressed at higher levels in BL21(DE3) cells than in BL21(DE3)pLysS or BL21(DE3)pLysE. However, the basal expression levels of heterologous genes are significantly higher in BL21(DE3) than in BL21(DE3)pLysS or BL21(DE3)pLysE.
Catalog: C6000-03
Size: 20 × 50 µl
Size: 20 × 50 µl
One Shot® BL21-AI™ E. coli are chemically competent cells designed for applications that require tight regulation and strong expression of toxic proteins from any T7 promoter-based expression systems. One Shot® BL21-AI™ Chemically Competent cells have a transformation efficiency of >1×10 8 cfu/ µg plasmid DNA. • Ideal for inducing expression of toxic protein • Gene expression is regulated by the addition of L-arabinose to culture • Suitable for use with any T7 promoter-based plasmids • Supplied in a convenient One Shot® format Excellent Expression of Toxic Recombinant Proteins One Shot® BL21-A...
Catalog: C6070-03
Size: 20 × 50 µl
Size: 20 × 50 µl
One Shot® TOP10 E. coli are convenient to use chemically competent cells quality controlled for a transformation efficiency of 1 x 10 9 cfu/ µg plasmid DNA. One Shot® TOP10 Chemically Competent cells are the same competent cells that come with many of our cloning kits and are ideal for high-efficiency cloning and plasmid propagation. • Maximizes cloning efficiency in single tube format • Enhanced genomic DNA cloning capabilities Easy-to-use, Single Tube Format One Shot® TOP10 E. coli are provided at a transformation efficiency of 1 x 10 9 cfu/ µg supercoiled DNA and allow stable replication of...
Catalog: C4040-06
Size: 40 reactions
Size: 40 reactions
BL21(DE3)pLysE E. coli are ideal for use with T7 promoter-based expression vectors. Like BL21(DE3)pLysS E. coli , BL21(DE3)pLysE carry the lambda DE3 lysogen. In addition, BL21(DE3)pLysE cells contain the pLysE plasmid, which constitutively expresses T7 lysozyme. T7 lysozyme reduces the basal expression of target genes by inhibiting T7 RNA polymerase. The pLysE plasmid in BL21(DE3)pLysE expresses higher levels of T7 lysozyme than the pLysS plasmid in BL21(DE3)pLysS. The BL21(DE3)pLysE strain provides tighter control of T7 RNA polymerase, which is necessary when the recombinant protein to be ex...
Catalog: C6565-03
Size: 20 × 50 µl
Size: 20 × 50 µl
The One Shot® Stbl3™ E. coli strain is designed especially for cloning direct repeats found in lentiviral expression vectors. Unlike TOP10 E. coli , these cells reduce the frequency of homologous recombination of long terminal repeats (LTRs) found in ViraPower™ Lentiviral Expression Vector and other retroviral vectors. The DNA yield from Stbl3™ cells is often >10-fold higher than alternative strains such as TOP10 (Table 1). One Shot® Stbl3™ Chemically Competent Cells deliver: • Optimal performance for the propagation of lentiviral vectors • Enhanced genomic cloning capacity ( mcr B, mrr ) • Ex...
Catalog: C7373-03
Size: 20 × 50 µl
Size: 20 × 50 µl
TOP10 E. coli are provided at a transformation efficiency of 1 x 10e 9 cfu/µg supercoiled DNA and are ideal for high-efficiency cloning and plasmid propagation. They allow stable replication of high-copy number plasmids. The genotype of TOP10 cells is similar to the DH10B™strain, and offers the following features: -hsd R for efficient transformation of unmethylated DNA from PCR amplifications -mcrA for efficient transformation of methylated DNA from genomic preparations -lacZΔM15 for blue/white color screening of recombinant clones -endA1 for cleaner preparations of DNA and better results in d...
Catalog: C4040-10
Size: 10 reactions
Size: 10 reactions
One Shot® BL21 Star™ (DE3) E. coli are chemically competent cells designed for applications that require high-level expression of non-toxic recombinant proteins from low copy number, T7 promoter-based expression systems (e.g., Champion™ pET vectors) . One Shot® BL21 Star™ (DE3) Chemically Competent cells are controlled for a transformation efficiency of 1 x 10 8 cfu/ µg plasmid DNA. • A genotype that promotes high mRNA stability and protein yield • Ideal for use with low copy number, T7 promoter-based plasmids • The single tube, single use format allows all transformation steps to take place i...
Catalog: C6010-03
Size: 20 reactions
Size: 20 reactions
MC1061/P3 competent E. coli are used for highly efficient transformation of vectors that require the P3 episome for selection and maintenance (i.e., pCDM8, pcDNA™1.1, or any other sup F-containing vector).
Catalog: C663-03
Size: 1.5 ml
Size: 1.5 ml
The OmniMAX™ 2 T1 Phage-Resistant (T1 R ) E. coli strain is an improved chemically competent cell line, perfect for use in all cloning applications, including the Gateway® Technology. OmniMAX™ 2 -T1 R cells offer the highest transformation efficiency of any chemically competent cells in a One Shot® format with >5 x 10 9 transformants/µg pUC19. They also provide efficient transformation of highly methylated DNA, since OmniMAX™ 2 -T1 R cells lack the E. coli K12 restriction systems (mc rA Δ (mrr hs dRMS- mc rBC)). In addition, the strain carries the to nA genotype, which confers resistance to T1...
Catalog: C8540-03
Size: 20 transformations
Size: 20 transformations
The TA Cloning® Kit with pCR™2.1 vector provides a quick, one-step cloning strategy for directly inserting a Taq -amplified PCR product into a plasmid vector. The TA Cloning® Kit uses the pCR™2.1 cloning vector and ExpressLink™ T4 DNA Ligase to generate a ligation product in a fifteen-minute, room-temperature ligation step. Reactions typically yield >80% recombinants containing inserts. Features of the TA Cloning® Kit with pCR™2.1 vector: • Fast & convenient —15-minute, room-temperature ligation • Efficient —blue/white screening and >80% clones with correct insert • Flexible —choice of kanamyc...
Catalog: K2020-40
Size: 40 reactions
Size: 40 reactions
The TA Cloning® Kit Dual Promoter with pCR™II vector provides a quick, one-step cloning strategy for directly inserting a Taq -amplified PCR product into a plasmid vector. The T7 and Sp6 promoters of the pCR™II vector allow in vitro transcription of the insert to produce sense or anti-sense products. The TA Cloning Kit Dual Promoter uses the pCR™II cloning vector and ExpressLink™ T4 DNA Ligase to generate a ligation product in a fifteen-minute, room-temperature ligation step. Reactions typically yield >80% recombinants containing inserts. Features of the TA Cloning® Kit Dual Promoter: • Fast &...
Catalog: K2070-40
Size: 40 reactions
Size: 40 reactions
The Molecular Probes® BioParticles® product line consists of a series of fluorescently labeled, heat- or chemically killed bacteria and yeast in a variety of sizes, shapes, and natural antigenicities. These fluorescent BioParticles® products have been employed to study phagocytosis by fluorescence microscopy, quantitative spectrofluorometry, and flow cytometry. We offer E. coli (K-12 strain), S. aureus (Wood strain, without protein A) and zymosan ( S. cerevisiae ) BioParticles® conjugates covalently labeled with a variety of different fluorophores (special care has been taken to remove free dy...
Catalog: E-2864
Size: 10 mg
Size: 10 mg
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