Fig. 4 a Optimal ratio of DNA polymerase mixture. A target
of 10 kb was replicated using mixtures of the Taq and Tce
DNA polymerases (Taq:Tce), and concentration ratios were
varied as indicated. PCR amplification was carried out in 30
cycles of 94C for 20 s and 72C for 10 min. Lane M 1 kb
DNA ladder. b Application to long-range PCR for comparison
of PCR amplification using Tce, Tce plus, Taq or Pfu DNA
polymerase. PCR was performed at 94C for 1 min; 30 cycles
of 94C for 20 s and 72C for target length/1 min. Target