Due to high background, cloning blunt-end and long PCR products can be difficult and often yields a low percentage of recombinants. Our unique Zero Background™ technology uses the lethal ccdB gene (control of cell death) gene to enable high-efficiency cloning.
The ccdB gene is incorporated into the cloning site of Zero Background™ vectors.The CcdB protein poisons bacterial gyrase, causing degradation of the hose chromosome and cell death. When an insert is ligated into the vector, the ccdB gene is disrupted, enabling only recombinant colonies to grow. By eliminating high vector background, the Zero Background™ technology yields nearly 100% recombinants, freeing you from having to screen hundreds of background colonies.
Zero Blunt® Cloning Kits
Zero Blunt® TOPO® Cloning
Go from PCR to clone in just 5-minutes using Zero Blunt® TOPO® technology. Zero Blunt® TOPO® yields up to 95% clones with the correct insert and no ligase, post-PCR procedures, or PCR primers containing specific sequences are required.
Cloning Support Center
Find tips, troubleshooting help, and resources for your cloning applications
Learn about PCR cloning strategies and subcloning approaches
Review the importance of high-fidelity PCR in cloning and more