Abstract
Fluorescence resonance energy transfer (FRET) in association with a time-resolved fluorescence mode of detection was used to design a new homogeneous technology suitable to monitor biomolecular interactions. A lanthanide cryptate characterised by a long lived fluorescence emission was used as donor and a cross-linked allophycocyanine was used as acceptor. This new donor/acceptor pair displayed an exceptionally large Förster radius of 9 nm. This allowed to build up a set of labelling strategies to probe the interactions between biomolecules with an emphasis on fully indirect cassette formats particularly suitable for high throughput screening applications. Herein we describe the basics of the technology, review the latest applications to the study of molecular interactions involved in cells and new oligonucleotides based assays.
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