Stabilise toxic sequences behind T7 or lac-based promoters with this strain containing a LacI repressor, providing tight control over leaky expression.

Induce high-level protein expression from T7 promoters with tight control over leaky expression, using this strain containing a LacI repressor.

Express difficult or toxic proteins using standard E. coli T7 expression vectors using these unique strains. Some strains also available in electrocompetent format.

Clone and subclone with high efficiency, chemically competent DH5-alpha cells.

Clone unstable and toxic sequences in standard plasmids, with high efficiency.

Clone and maintain unstable or repetitive sequences and lentiviral libraries with high efficiency. Ideal for GeCKO CRISPR library transformation.

Clone and sub-clone with high-efficiency, recA, endA competent cells.

Clone, construct libraries, transform Gibson Assembly® reactions all with high-yield, T1 phage-resistant cells in high efficiencies for routine and challenging applications.

Get better colony counts for routine protein expression with any E. coli T7 expression vector, with this high-efficiency BL21(DE3) strain.