Assay Method Information |
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| Homogeneous Time-Resolve Fluorescence (HTRF) Assay |
Description: | One potential limitation of the above FP assay is the risk of selection of compounds that may interfere with the FP assays and produce so called false-positives. Therefore, during development of embodiments of the present invention, a time-resolved fluorescence resonance energy transfer (TR-FRET) assay was utilized as a secondary, assay (e.g. for confirmation of results), commercialized by CIS-BIO as homogeneous time-resolve fluorescence (HTRF) assay. In some embodiments, the HTRF assay may be the primary assay and the FP assay is used as a secondary assay to confirm results. HTRF is based on the non-radiative energy transfer of the long-lived emission from the Europium cryptate (Eu3+-cryptate) donor to the allophycocyanin (XL665) acceptor, combined with time-resolved detection. When these two fluorophores are brought together by a biomolecular interaction, a portion of the energy captured by the Eu3+-cryptate during excitation at 337 nm is released through fluorescence emission. |
Affinity data for this assay | |
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