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Victor E. Balderas Hernandez,Luz M. T. Paz Maldonado,Emilio Medina Rivero,Ana P. Barba de la Rosa,Leandro G. Ordonez Acevedo,Antonio De Leon Rodriguez 한국생물공학회 2008 Biotechnology and Bioprocess Engineering Vol.13 No.1
The production of human interferon gamma (hIFN-γ) using a synthetic gene in Escherichia coli BL21-SI was optimized by response surface methodology (RSM) and a Box-Behnken design. The process variables studied were temperature, biomass concentration at induction time and the NaCl concentration as inducer. According to the Box-Behnken design, a second order response function was developed. The optimal expression conditions were a temperature of 32.6℃, induction biomass of 0.31 g/L and 0.3 M NaCl in minimal medium. The model prediction for the maximum hIFN-γ production was 77.3 mg/L, which corresponded satisfactorily with the experimental data. The hIFN-γ concentration attained under optimized conditions was 13-times higher than that obtained using the non-optimized conditions. We conclude that RSM is an effective method for the optimization of recombinant protein expression using synthetic genes in E. coli.