Field of the Invention
The present invention relates to a method for producing a useful substance using a microorganism.
Brief Description of the Related Art
When producing amino acids such as glutamic acid and alcohols such as isopropyl alcohol by fermentation, succinic acid is produced as one of several by-products (WO2013/018734 and WO2008/114721). Consequently, the yield of the objective substance is decreased and, thus, not only the cost of the raw materials for the fermentation but also the cost of purifying the product are increased, which is uneconomical.