PCAF and p300/CBP are the main HATs that have been observed to acetylate a number of non-histone proteins. For PCAF, these include the non-histone chromatin (high-mobility group (HMG)) proteins HMG-N2/HMG17 and HMG-I(Y), the transcriptional activators p53, MyoD, E2F(1-3), and HIV Tat, and the general transcription factors TFIIE and TFIIF. Other proteins include CIITA, Brm (chromatin remodeler), NF-κB (p65), TAL1/SCL, Beta2/NeuroD, C/EBPβ, IRF2, IRF7, YY1, KLF13, EVI1, AME, ER81, and the androgen receptor (AR). PCAF has also been observed to acetylate c-MYC, GATA-2, retinoblastoma (Rb), Ku70, and E1A adenovirus protein. It can also autoacetylate, which facilitates intramolecular interactions with its bromodomain that may be involved in the regulation of its HAT activity.