What PCR enzyme would you recommend for use with the Directional TOPO® Cloning Kits?

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For the Directional TOPO® Cloning Vectors, a PCR product must be generated by a proofreading enzyme to create a blunt product. Pfx50™ or Accuprime™ Pfx and Accuprime™ Pfx Supermix from Life Technologies are recommended for use.

When cloning a Pfx-amplified PCR product, the insert to vector ratio is an important consideration. The PCR product generally needs to be diluted since Pfx generates a high concentration of product and using too much insert DNA can hamper the TOPO® reaction. A 1:1 molar ratio of vector to insert (or about 2-10ng of insert) is recommended.

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