For shake flask cultivation of A. niger CAD transformants, vogel’s minimal medium (Vogel, 1956) was supplied with 2 100 ml per strain (106 spores/ml) in a 500 ml Erlenmeyer flask. A. niger CAD transformants were cultivated for 50–60 h at 33 C, 150 rpm. The medium used for cultivating A. niger CAD transformants in the fermentor contained the same components as A. terreus with 0.7 mg of MnCl24H2O and 100 g/l glucose as carbon source. Uridine (2.5 g/l) was supplied to compensate the deficiency in the A. niger strain. Per fermentation, pre-cultures were carried out in 2 100 ml of the production medium (106 spores/ml) in 500 ml baffled Erlenmeyer flasks for 64 h at 33 C, 125 rpm. The fermentation conditions for A. niger CAD transformants were the same as the basic fermentation conditions for A. terreus, except that the DO was controlled at 25% throughout the fermentation.
For shake flask cultivation of A. niger CAD transformants, vogel’s minimal medium (Vogel, 1956) was supplied with 2 100 ml per strain (106 spores/ml) in a 500 ml Erlenmeyer flask. A. niger CAD transformants were cultivated for 50–60 h at 33 C, 150 rpm. The medium used for cultivating A. niger CAD transformants in the fermentor contained the same components as A. terreus with 0.7 mg of MnCl24H2O and 100 g/l glucose as carbon source. Uridine (2.5 g/l) was supplied to compensate the deficiency in the A. niger strain. Per fermentation, pre-cultures were carried out in 2 100 ml of the production medium (106 spores/ml) in 500 ml baffled Erlenmeyer flasks for 64 h at 33 C, 125 rpm. The fermentation conditions for A. niger CAD transformants were the same as the basic fermentation conditions for A. terreus, except that the DO was controlled at 25% throughout the fermentation.
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