| http://www.w3.org/ns/prov#value | - Similarly, the IBL may be a derivative of fluorescein whose color changes between aqueous and nonpolar solvents. [0565] In one embodiment, the DBL may be attached to a bead, i.e. a ???decoder bead???, that may carry a label such as a fluorophore. [0566] In a preferred embodiment, the IBL-DBL pair comprise substantially complementary single-stranded nucleic acids.
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