Add time:07/28/2019 Source:sciencedirect.com
A synthetic medium, TK-25, for high cell density cultivation (HCDC) of Escherichia coli K-12 was modified to support HCDC of strain JM109. By optimizing the culture conditions, the cell concentration of 65 g/l in 14 h was obtained in the optimized medium, namely TK-10, with glucose-fed batch cultivation. When these conditions were further applied for HCDC of E. coli JM109 harboring pUC-based recombinant plasmid which expresses a hirudin variant, HV-1-fused protein under the control of trp promoter, it grew to 24 g/l of dried cells expressed as an inclusion body as 15.9% of the total protein, corresponding to 1908 mg/l hirudin-fused protein.
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