One Shot™ ccdB Survival™ 2 T1^R Competent Cells (Invitrogen™)

One Shot ccdB Survival 2 T1^R Competent Cells are suitable for the propagation of plasmids containing the ccdB gene and are designed for use with the Gateway Vector Conversion System and for propagating Gateway destination, donor, and supercoiled entry vectors. ccdB Survival 2 T1R cells that are made chemically competent can achieve high transformation efficiency of >1 x 10⁹ transformants/μg plasmid DNA.

The ccdB Survival 2 T1^R E. coli strain is derived from the TOP10 strain and offers the same benefits. Mutations in the methylation-dependent restriction system (mcrA, mcrBC, and mrr) allow cloning of both prokaryotic and eukaryotic genomic DNA that contains methylcytosine and methyladenine. This strain also has the lacZΔM15 genotype, providing the option of blue-white screening on plates containing either X-Gal or Bluo-Gal. In addition, recA1 and endA1 mutations increase insert stability and improve the quality of plasmid DNA prepared from minipreps.The tonA (also known as fhuA) mutation in ccdB Survival 2 T1^R cells confers resistance to bacteriophages T1 and T5, safeguarding samples against contamination.

ccdB Survival 2 T1^R Competent Cells offer:
• >1 x 10⁹ transformants/μg efficiency
• tonA (fhuA) genotype to confer resistance to T1 and T5 phage
• Support of high-yield preparation of supercoiled plasmid DNA (the endA1 phenotype)
• Reduced nonspecific recombination of cloned DNA (the recA1 phenotype) 

Convenient and efficient format
One Shot ccdB Survival 2 T1^R E. coli are supplied in the convenient, single-reaction One Shot format. Each tube contains enough cells for one transformation so there are no efficiency-zapping, freeze-thaw cycles or money wasted on unused cells.

Genotype: F^-mcrA Δ(mrr-hsdRMS-mcrBC) φ80lacZΔM15 ΔlacX74 recA1 araΔ139 Δ(ara-leu)7697 galU galK rpsL(Str^R) endA1 nupG fhuA::IS2

Find the strain and format that fits your needs
We offer other DH strains in chemically competent and electrocompetent cell formats to meet your specific needs.
MultiShot formats for high throughput applications are available.
Explore bacterial growth media formats.