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Present research provided an efficient approach to obtain large quantities of active recombinant CI-b1, a Kunitz-type chymotrypsin inhibitor of silkworm, Bombyx mori. The cDNA encoding mature CI-b1 was cloned into pDEST17 vector. Recombinant protein with hexa-histidine tag attached to the N-terminal of CI-b1 was expressed in Escherichia coli Origami B cells. It can be purified to homogeneity via the...
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