Abstract

The expression level of chicken β-defensin Gal-3 was influenced by lactose concentration, induction time and initial cell density, and IPTG induction was used as a control. The optimal parameters of various factors were confirmed. the optimal parameters with lactose induction was 37°C of culture temperature, 2 g/L of joining lactose final concentration when the recombinant strain growth density A600 achieved 0.8 and induction maintained 3 hours, the production of fusion protein reached the highest level. This study provides a good experimental basis for the large production of Gal-3.

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