Component of HBO1 complexes, which specifically mediate acetylation of histone H3 at 'Lys-14' (H3K14ac), and have reduced activity toward histone H4. Through chromatin acetylation it may function in DNA replication. Homodimer. Component of the HBO1 complex. The PHD-type zinc finger mediates the binding to H3K4me3. Belongs to the ING family.