| http://www.w3.org/ns/prov#value | - R1 is selected from among poly(ethylene glycol), poly(ethylene oxide), poly(hydroxyacid)), a carbohydrate, a protein, a polypeptide, an amino acid, a nucleic acid, a nucleotide, a polynucleotide, any genetic material, such as a DNA or RNA segment, a lipid, a polysaccharide, an antibody, a pharmaceutical agent, or any epitope for a biological receptor; or
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