Comparison between Recombinant Catalase and Commercial Catalae

The properties of recombinant catalase and commercial catalase were compared. The optimum temperature of recombinant catalase and commercial catalase were 70 ℃ and 40 ℃, respectively; the recombinant catalase was more stable than commercial catalase under high temperature circumstance. The optimum pH of both catalases was 7.0. Both catalases were stable at pH range 3～8. The activity of recombinant catalase didn't lose for a month at room temprature, while that of commercial catalase lost 70%. Both enzymes were strongly inhibited by many metal ions, The commercial catalase was inhibited by EDTA, while no affect was found on the recombinant catalase.