| http://www.w3.org/ns/prov#value | - Exemplary functional groups include hydroxyl, active esters (e.g. N-hydroxysuccinimidyl, 1-benzotriazolyl, p-nitrophenyl, or imidazolyl esters), active carbonates (e.g. N-hydroxysuccinimidyl, 1-benzotriazolyl, p-nitrophenyl, or imidazolyl carbonate), acetal, aldehyde, aldehyde hydrates, alkyl or aryl sulfonate, halide, disulfide derivatives such as o-pyridyl disulfidyl, alkenyl, acrylate, methacry
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