[Comparative study of E. coli strains producing amino acids].

Transduction of the locus of stability to high threonine concentrations (Thrr) into E. coli str M1 and C600 resulted in enhancements of the amino acid production and retardation of the culture development. Besides the mutation caused increase of the specific activity of glutamate synthase, aspartate kinase and homoserine dehydrogenase.

[Amination in E. coli strains effectively producing threonine].

The effect of the mutation of threonine and homoserine resistance (thrr) on the activity of the enzymes catalysing the biosynthesis of glutamic acid, glutamate synthase (EC 1.4.1.