PROCESS FOR THE FERMENTATIVE PRODUCTION OF SULPHUROUS AMINO ACIDS

摘要

The invention relates to a process for the fermentative production of sulphurous amino acids selected from the group consisting of L-methionine, L-cysteine, L-cystine, L-homocysteine and L-homocystine, comprising the steps: a) providing a microorganism from the Enterobacteriaceae family or a microorganism from the Corynebacteriaceae family which has an increased thiosulphate sulphurtransferase activity compared with the respective initial strain; b) fermenting the microorganism of a) in a medium which comprises an inorganic sulphur source selected from the group consisting of salt of dithiosulphuric acid or a mixture of a salt of dithiosulphuric acid and a salt of sulphuric acid, which gives a fermentation broth, and c) concentrating the sulphurous amino acid in the fermentation broth of b).