Histone acetyltransferase GCN5; Acetylates histone H2B to form H2BK11ac and H2BK16ac, histone H3 to form H3K14ac, with a lower preference histone H4 to form H4K8ac and H4K16ac, and contributes to H2A.Z acetylation. Acetylation of histones gives a specific tag for epigenetic transcription activation (By similarity) (452 aa)