gmPfu DNA Polymerase was cloned from Pyrococcus furiosus and genetically modified for high processivity. High-fidelity DNA polymerization is obtained with gmPfu DNA Polymerase, allowing amplification of DNA up to 10 kb long. gmPfu DNA Polymerase is more effective than general Pfu DNA polymerase and has a high amplification rate. It provides lower error rate and produces blunt-end PCR products.