| http://www.w3.org/ns/prov#value | - es such as proteins and wherein P and Q represent linkage fragments that join polymer arms polya and polyb,...http://www.google.ca/patents/US5932462?utm_source=gb-gplus-sharePatent US5932462 - Pure water soluble polymer linked to single ionizable reactive group by nonreactive linkage fragments with no aromatic rings and ester groups; can be purified by ion exchange chromatographyAdvanced Patent Se
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