| http://www.w3.org/ns/prov#value | - In one embodiment, the polymer is a polyethylene glycol (PEG); In one embodiment, the polyethylene glycol is PEG with a molecular weight of 300-100,000 Da, such as about 500-20,000 Da., or about 500-15,000 Da, or 2-15 kDa, or 3-15 kDa, or 3-12 kDa, or about 10 kDa.
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