prov:value
| - E is carboxyl or a salt thereof, Y is a compound according to structural formula (Y-1), (Y-2), (Y-3) or (Y-4), where L is attached at position R3???, or is a compound according to structural formula (Y-20b), (Y-21b), (Y-22b), (Y-23b), (Y-24b), (Y-25b), (Y-31b), (Y-34b), (Y-35b), (Y-36b), (Y-39b), (Y-41b), (Y-42b), (Y-43b), or (Y-46b); DD/AD is a fluorescein dye having a 5- or 6-carboxyl group or a
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