Assertion: adenosine deaminase | /r/HasProperty | purified by chromatography
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Source sentences:
text: The adenosine deaminase from calf spleen was purified 500-fold by isoelectric precipitation, ammonium sulfate fractionation, and chromatography on Bio-Rex-70, DEAE Sephadex A-50 and SE-Sephadex C-50, the last two steps being repeated.