Competent Cells

The ABLE K strain help solve issues associated with toxic clones. The ABLE K strain reduces the copy number of these plasmids approximately 10-fold. This decreases the level of cloned protein product, increasing cell viability when protei... Read more...

Replicating eukaryotic DNA in prokaryotic cells can be problematic. Particular eukaryotic genes may contain inverted repeats or secondary structures, such as Z-DNA, that can be rearranged or deleted by E. coli DNA repair systems. The SURE... Read more...

TKB1 Competent Cells are derived from the BL21 strain and are intended for use with pET, pCAL or other T7 RNA promoter-based vectors. TKX1 Competent Cells are derived from the XL1-Blue strain and are intended for use with non-T7 promoter ... Read more...

When DNA is methylated in a fashion unlike the bacterial host patterns, it is cleaved by the E. coli host restriction systems.  Read more...

Highest efficiency competent cells in convenient packaging designed to satisfy higher throughput requirements. For ultimate convenience we offer custom configurations, formulations, and packaging options. Visit our custom & bulk services p... Read more...

In addition to enhancing protein solubility, we have combined our cold-adapted technology with our premiere BL21-CodonPlus competent cells to further increase your chances of protein expression success.  Read more...

BL21-Gold competent cells feature the high transformation efficiency phenotype (Hte) and have the gene encoding endonuclease I (endA) inactivated. Read more...

A collection of classic strains and competent cells. Read more...

The exclusive BacterioMatch II two-hybrid system is an efficient method for detecting protein-protein interactions in vivo . The BacterioMatch II system offers the ability to screen libraries for harder-to-find binding partners with reduc... Read more...

The AdEasy system saves you a month of work over traditional methods by producing the recombinant adenoviral plasmid by homologous recombination in E. coli. The AdEasy XL system includes BJ5183 cells pre-transformed with the pAdEasy-1 pla... Read more...

BL21-CodonPlus strains are engineered to contain extra copies of genes that encode the tRNAs that most frequently limit translation of heterologous proteins in E. coli. They are ideal for difficult protein expression, especially when codo... Read more...

BL21-CodonPlus strains are engineered to contain extra copies of genes that encode the tRNAs that most frequently limit translation of heterologous proteins in E. coli. They are ideal for difficult protein expression, especially when codo... Read more...

A collection of classic strains and competent cells. Read more...

ArcticExpress Competent Cells are engineered to address the common bacterial gene expression hurdle of protein insolubility. These cells are derived from the high-performance Stratagene BL21-Gold competent cells, enabling efficient high-l... Read more...

The AdEasy system saves you a month of work over traditional methods by producing the recombinant adenoviral plasmid by homologous recombination in E. coli. The AdEasy XL system includes BJ5183 cells pre-transformed with the pAdEasy-1 pla... Read more...

High efficiency competent cells in convenient packaging designed to satisfy higher throughput requirements. For ultimate convenience we offer custom configurations, formulations, and packaging options. Read more...

The ABLE C strain and the ABLE K strain help solve issues associated with toxic clones. The ABLE C strain reduces the copy number of ColE1-derived plasmids, e.g. pUC and pBluescript, by approximately 4-fold (compared to the XL1-Blue strai... Read more...

High efficiency competent cells in convenient packaging designed to satisfy higher throughput requirements. For ultimate convenience we offer custom configurations, formulations, and packaging options. Read more...

These competent cells offer the highest transformation efficiencies available, enabling dramatically improved transformation efficiencies when cloning large plasmids and ligated DNA.  Read more...

A collection of classic strains and competent cells. Read more...

When DNA is methylated in a fashion unlike the bacterial host patterns, it is cleaved by the E. coli host restriction systems. Read more...

The ABLE C strain and the ABLE K strain help solve issues associated with toxic clones. These strains reduce the copy number of common cloning vectors by ~4- and 10-fold, enhancing the probability that a toxic clone will be propagated. Read more...

When DNA is methylated in a fashion unlike the bacterial host patterns, it is cleaved by the E. coli host restriction systems.  Read more...

The basic BL21 strain does not contain the T7 RNA polymerase gene and can be used with non-T7 RNA polymerase protein expression systems.  Read more...

Replicating eukaryotic DNA in prokaryotic cells can be problematic. Particular eukaryotic genes may contain inverted repeats or secondary structures, such as Z-DNA, that can be rearranged or deleted by E. coli DNA repair systems. The SURE... Read more...