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Assay Method Information

Assay Name:  Inhibition Assay
Description:  HDAC inhibition assays were performed by Reaction Biology Corp. (Malvern, Pa.) using isolated human, recombinant full-length HDAC1 and -6 from a baculovirus expression system in Sf9 cells. An acetylated fluorogenic peptide, RHKKAc, derived from residues 379-382 of p53 was used as substrate. The reaction buffer was made up of 50 mM Tris-HCl pH 8.0, 127 mM NaCl, 2.7 mM KCl, 1 mM MgCl2, 1 mg/mL BSA, and a final concentration of 1% DMSO. Compounds were delivered in DMSO and delivered to enzyme mixture with preincubation of 5-10 min followed by substrate addition and incubation for 2 h at 30° C. Trichostatin A and developer were added to quench the reaction and generate fluorescence, respectively. Dose-response curves were generated starting at 30 μM compound with three-fold serial dilutions to generate a 10-dose plot. IC50 values were then generated from the resulting plots, and the values expressed are the average of duplicate trialsąstandard deviation.
Affinity data for this assay
 

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Last update November 1, 2007
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