FIELD: biotechnology. SUBSTANCE: waste were treated with 7-10% sodium chloride solution at pH = 8.0-8.5 for 2.5-3.5 h, DNA extract is separated from the solid fraction by ultrafiltration and extract is concentrated to dry matter content 1.8-3.0%. Preparation is dried, treated with ethanol at 40-50 C and dried in air. Yield of nucleoprotein is 5-6%, DNA content - about 70%. EFFECT: improved method of preparing. 4 cl
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