| 摘要 |
The present invention provides a bacterium belonging to the family Enterobacteriaceae, which is able to produce L-cysteine, and has been modified to decrease activity of the YdjN protein, or the activities of the YdjN and the FliY protein. This bacterium is cultured in a medium, and L-cysteine, L-cystine, a derivative or precursor thereof, or a mixture of these can be collected from the medium.
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