FIELD: biotechnology, microbiology, amino acids.
SUBSTANCE: invention relates to a method for preparing L-amino acids, for example, L-arginine by culturing of microorganism as a producer of L-arginine belonging to genus Escherichia. Indicated microorganism is modified and it comprises inactivated operon nir. Then accumulated L-arginine is isolated from the cultural fluid. The claimed invention provides preparing L-arginine with the high degree of effectiveness.
EFFECT: improved preparing method.
4 cl, 1 tbl, 2 ex
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