FIELD: chemistry, biotechnology.
SUBSTANCE: invention relates to biotechnology. Method includes addition to fermentation broth or homogenate from E. coli of efficient quantity of ethacridinlactate solution for sedimentation of contamination from host-cells in conditions, when greater part of polypeptide remains dissolved, and isolation of heterological polypeptide from broth or homogenate.
EFFECT: simplification of target polypeptide purification and obtaining it with high degree purity.
23 cl, 15 dwg, 3 tbl
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