It is possible to use "high-fidelity" polymerases, such as Pfu or Tth, in PCRs, rather than Taq. Most high-fidelity polymerases, however, require longer than Taq to complete the elongation step in PCR. Why is that?
Added by Jose Antonio L.
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This proofreading activity results in a slower elongation step compared to Taq polymerase, which lacks proofreading capabilities. Show more…
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