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The industrial production of recombinant proteins requires control of both fermentation and purification steps. For the serodiagnosis of toxoplasmosis, the main antigen is a membrane protein of 30 kDa (P30). The P30 gene was cloned and expressed in Schizosaccharomyces pombe at 0.7 μg/ml in culture medium. Batch fermentation was optimized by the specific choice of peptones, which enabled optimum growth...