Twenty years ago, the TOPO™ name became synonymous with superior quality and game-changing innovation in PCR cloning. Today, Invitrogen™ TOPO cloning kits are still the fastest, simplest, and most efficient cloning solutions available. There is no substitute.

  • Fast—5-minute, room temperature reaction
  • Simple—add restriction sites and/or universal primer sites to either end of your PCR product in just 3 easy steps
  • Efficient—up to 95% of clones contain desired insert
  • Flexible—available in a variety of formats and sizes to suit your choice in polymerase
  • Proven—20,000 citations

No matter what your downstream application is, TOPO PCR cloning solutions help you get the right clone sooner, freeing up your time to answer more important questions.

TOPO cloning technology brochure


Featured video

See how TOPO PCR Cloning technology works

Learn how simple it is to get 95% recovery of your clone in just 5 minutes.

Choose the right TOPO cloning solution for you

For the direct insertion of blunt-end PCR products amplified with proofreading thermostable polymerases into a plasmid vector. Now with 25% extra reactions.

For the direct insertion of Taq polymerase–amplified PCR products into a plasmid vector for subcloning. Now with 25% extra reactions.

For easy, efficient cloning of long (3–10 kb) PCR products using the Invitrogen™ PCR™-XL-TOPO vector.

TOPO Kits without competent cells

Now with 25% extra reactions.

Gateway Recombinant Cloning with TOPO Technology

Expression cloning with TOPO Technology

Meet the Inventor

Find out how the revolutionary TOPO cloning was developed with Dr. Jon Chestnut, research fellow in Synthetic Biology RND.

Dr. Jon Chesnut
TOPO Cloning Technology

Cloning Support Center
Find tips, troubleshooting help, and resources for your cloning applications

Cloning Education
Learn about PCR cloning strategies and subcloning approaches

PCR Education
Review the principles of PCR, components, cycling parameters, methods, and applications