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. Author manuscript; available in PMC: 2021 Mar 18.
Published in final edited form as: Curr Protoc. 2021 Feb;1(2):e54. doi: 10.1002/cpz1.54
Initial step: 3 min 95°C (denaturation)
25 cycles: 30 s 95°C (denaturation)
30 s 50-65°C* (annealing)
1 min/kb** 72°C** (extension)
Final step: 5 min 72°C (extension).
*

The annealing temperature will depend on the melting temperature of the primers (see, e.g., https://www.sigmaaldrich.com/technical-documents/articles/biology/oligosmelting-temp.html). For best results, set up multiple PCRs at different melting temperatures and choose one that provides a single clean band on the gel.

**

If the plasmid is >10 kb, increase extension time to 2 min/kb and reduce temperature to 68°C.