| http://www.w3.org/ns/prov#value | - aspect, at least one of the glycosyl donors comprises a modifying group, where preferably, the modifying group is a member selected from the group consisting of a polymer, a therapeutic moiety, a detectable label, a reactive linker group, a targeting moiety, and a peptide, more preferably, the modifying group is a water soluble polymer, which even more preferably, comprises poly(ethylene glycol,
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