Assertion: polysaccharide | /r/HasProperty | purified by 20%
Facets:
Source sentences:
text: The polysaccharide was purified by 20% (V/V) ethanol precipitation (30 minutes, 2–8 °C) followed by ultrafiltration (50 KD, 30 minutes, 2–8 °C) to remove bacterial nucleic acids and proteins.