Mechanism of fermentation conversion from polyalcohol fermentation to ethanol fermentation by Pichia miso.

A possible mechanism of fermentation conversion is described from polyalcohol fermentation to ethanol fermentation by Pichia miso.Little alcohol dehydtogenase activity was found in polyalcohol-producing cells, whereas higher enzyme activity was induced by ethanol-producing cells.The fermentation conversion may be caused by the different levels of alcohol dehydrogenase activity between polyalcohol and ethanol-producing cells.It was also shown that yeast growth was inhibited and that yeast cells were lysed by ethanol (at 6g/100ml) that accumulated in 24hr .