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Time course of the production of porphyrins by P. freudenreichii IFO 12426 that harbored various expression vectors. (A) Production of UP I; (B) production of UP III; (C) production of CP. Open circles, pPK705; open triangles, pKHEM04; open squares, pKHEM05; open diamonds, pKHEM06. Each point is the mean of three experiments ± standard deviation.
