The synthesis of oligopeptide building blocks for the introduction of nonluminescent and luminescent lanthanide(III) chelates to the oligopeptide structure on the solid phase is described. The oligopeptide conjugates synthesized were used in DELFIA-based receptor binding assay (motilin) as well as in LANCE time-resolved fluorescence quenching assay (caspase-3).

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The synthesis of phosphoramidite building blocks that allow introduction of luminescent europium(III), terbium(III), dysprosium(III), and samarium(III) chelates to oligonucleotides on the solid phase is described. Several labeled oligonucleotides using these building blocks were prepared, and the photophysical properties of these bioconjugates were investigated.

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