| http://www.w3.org/ns/prov#value | - wherein n is an integer of from about 2 to 2000, normally from about 5 to 500, and advantageously from about 10 to 50; m is an integer of from about 2 to 100, typically from about 5 to 100, and advantageously from about 10 to 50, and wherein X and Y can be same or different and each independently is H, alkyl, alkenyl, aryl, or a reactive moiety, acryloyl, tresyl, N-succinimidyloxycarbonyl, 1-benzo
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