Vent DNA Polymerase is a high-fidelity thermophilic DNA polymerase. The fidelity of Vent DNA Polymerase is 5-15-fold higher than that observed for Taq DNA Polymerase (1,2). This high fidelity derives in part from an integral 3’→5′ proofreading exonuclease activity in Vent DNA Polymerase (1,3). Greater than 90% of the polymerase activity remains following a 1 hour incubation at 95°C.