PROCESS FOR THE PRODUCTION OF AMINO ACIDS BY FERMENTATION

摘要

Diclosed is a process for the production of L-threonine or L-isoleucine by fermentation, which comprises culturing in a medium a microorganism belonging tothe genus Escherichia and having a resistance to a purine analogue and the ability to produce L-threonine or L-isoleucine until L-threonine or Lisoleucine is accumulated in the culture, and recovering L-threonine or Lisoleucine therefrom.