MC1568 is a potent selective class II (IIa) histone deacetylas (HDAC II) inhibitor (IC50 of a maize deacetylase HD2 at 22.0 µM). MC1568 had no or a weak effect on the class I HDACs. MC1568 shows no inhibitory activity against HDAC1 but was able to inhibit HDAC4.
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