PHD finger protein 21A (PHF21A)

Part of the BHC complicated, a corepressor complex that represses transcription of neuron-specific genes in non-neuronal cells. The BHC complex is recruited at RE1/NRSE sites by REST and acts by deacetylating and demethylating specific sites on histones, thereby acting as a chromatin modifier.

In the BHC complicated, it may act as a scaffold. Inhibits KDM1A-mediated demethylation of'Lys-4' of histone H3 in vitro, suggesting a function in demethylation regulation.