HDAC activity assays carried out as described in (10 (link)). To perform the titration, 62 nM protein was incubated with varying concentrations of inositol-1,4,5,6-tetraphosphate and inositol-1,4,5-triphosphate for 30 min at 37°C then the HDAC activity was measured using the HDAC Assay Kit (Active Motif) and read using a Victor X5 plate reader (PerkinElmer). Experiments were performed in triplicate and data were analyzed using GraphPad Prism (version 4.0, GraphPad Software, Inc.).
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