The proteins of BET (bromodomain and extra-terminal) domain family are epigenetic readers. BET domain family proteins bind acetylated histones through their bromodomains to regulate gene transcription. BET domain family proteins consist of BRD2, BRD3, BRD4 and BRDT. They contain BDI, BDII and the extra-terminal (ET) domain. Interestingly, BDII of...