| http://www.w3.org/ns/prov#value | - ##STR00029## wherein Y is hydrogen or hydroxyl; Z is hydrogen or hydroxyl; R.sub.3 is hydrogen or alkyl; R.sub.4 is --(CH.sub.2).sub.nNH--, wherein n is an integer ranging from about 2 to about 10; Q is biotin or carboxyfluorescein; A is
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