CBP and p300 are highly related histone acetyltransferases (HATs). The
following figure shows the domain structure of p300.
Figure 4-G-2. The domain structure of p300
and the regions interacting with transcription regulators. "Bromo"
represents Bromodomain which specifically binds to acetylated lysine.
"CH-1, CH-2 and CH-3" are cysteine/histidine-rich regions.