Binds hyperacetylated chromatin and plays a role in the regulation of transcription, probably by chromatin remodeling. Regulates transcription of the CCND1 gene. Plays a role in nucleosome assembly (By similarity). May play a role in spermatogenesis or folliculogenesis. Homodimer. Interacts with E2F1 and with histone H4 acetylated at 'Lys-13' (By similarity). Detected on chromatin and nucleosomes. Predominantly expressed in the testis, followed by ovary, placenta, embryo and to a lower extent in somatic tissues. One bromodomain is sufficient for a partial interaction with histone H4 acetylated at 'Lys-13'.