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Taq polymerase is an enzyme that is used by scientists in the polymerase chain reaction because it is stable at high temperatures. It is the polymerase used by a bacteria, Thermus auquatics, which... Taq polymerase is an enzyme that is used by scientists in the polymerase chain reaction because it is stable at high temperatures. Large amounts of a sample of DNA are necessary for molecular and genetic analyses, and the polymerase chain reaction is used to amplify very small amounts of DNA.
The standard here is Taq polymerase, which has a processivity of 50 -60 nucleotides (nt) per second at 72 o C. The rule of thumb is to simply assume a low-end default processivity for Taq polymerase of 1000 nt per minute bearing in mind that setting your extension times for this assumed value is more than adequate.