Method for the fermentative production of L-cysteine and derivatives of said amino acid

摘要

The invention relates to a method for producing L-cysteine and its derivatives L-cystine and thiazolidine by fermenting a cysteine-producing microorganism strain in a fermentation medium. The invention is characterized in that L-methionine, L-isoleucine, or L-threonine in respective concentrations ranging from 0.1 to 10 g/L are added to the fermentation medium in the main culture.

主权项

1. A method for producing L-cysteine and its derivatives L-cystine and thiazolidine, said method comprising fermentation of a cysteine-producing microorganism strain in a fermentation medium in a preculture and a main culture in a fermenter, wherein L-methionine, L-isoleucine or L-threonine is added to the fermentation medium in the main culture each in a concentration range from 0.5 to 5 g/l.