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Objective: To explore high-yield secretory expression of recombinant mouse coagulation factor Ⅶ (rmF Ⅶ ) protein in Pichia pastoris (P. pastoris). Methods: The fragment of mF Ⅶ cDNA was amplified by PCR from a pcDNA3-mFⅦ plasmid. Then the cDNA fragment wa