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Assay Method Information

Assay Name:  Binding Assay
Description:  BRD binding and inhibition was assessed by measuring the interaction of biotinylated acetyl-histone H4 peptide (Anaspec #64989) with the BRD target protein utilising AlphaScreenŽ technology (Perkin Elmer). In a white 384-well low volume plate (Greiner #784076), 100 nL of compound series in DMSO (0.5% final concentration) was added to the BRD target protein (80 nM final). After 30 min incubation at RT, H4 peptide was added to a final concentration of 2.5 nM. AlphaScreen streptavidin donor beads and AlphaScreen nickel chelate acceptor beads were added to a final concentration of 10 ug/mL each and allowed to incubate in a darkened environment for 1 h at RT. Plates were read on an EnVision plate reader (Perkin Elmer) and IC50's calculated using a four parameter non-linear curve fit.These conditions are identical for all BRDs screened except BRD2D2 which uses 160 nM protein and 1.25 nM peptide.
Affinity data for this assay
 

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Last update November 1, 2007
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