Retinoblastoma-binding protein 5 (RBBP5)

In embryonic stem cells (ES) cells, plays a vital role in the differentiation potential, especially along the neural lineage, regulating gene induction and H3'Lys-4' methylation at key developmental loci, including that mediated by retinoic acid (By similarity). As part of the MLL1/MLL complicated, involved in mono-, di- and trimethylation at'Lys-4' of histone H3.

Histone H3 'Lys-4' methylation represents a specific tag for epigenetic transcriptional activation. .