prov:value
| - When the complementary functionality is amine, preferred linking groups include such groups as isothiocyanate, sulfonylchloride, 4,6-dichlorotriazinyl, carboxylate, succinimidyl ester, other active carboxylate, e.g., ???C(O)halogen, ???C(O)OC1-4 alkyl, or ???C(O)OC(O)C1-4 alkyl, amine, lower alkycarboxy or ???
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