Source: 50 μg of a complex of full length recombinant C-terminal His-tagged HDAC3 and recombinant N-terminal GST-tagged NCOR2 amino acids 395-489, co-expressed in baculovirus expression system · Mr: 49.7 kDa (HDAC3); 37.6 kDa (NCOR2) ? HDAC3 is a Class I HDAC that is inactive alone and requires binding with the deacetylase activation domain of NcoR2 for activation.