“Bromodomains (BRDs) are protein interaction modules that selectively recognize ε-N-acetylated lysine residues. The BET (bromodomain and extra-terminal) proteins are four closely related bromodomain-containing proteins (BRD2, BRD3, BRD4, and BRDT) which constitute a subset of the larger family of 47 bromodomain-containing proteins. BRDs are present in diverse proteins that play key functions in chromatin organization and regulation of gene transcription. Aberrant transcription is a hallmark of many diseases in particular cancer and inflammation. BET bromodomain proteins as regulatory factors for c-Myc. BET inhibition by JQ1 downregulates MYC transcription, followed by genome-wide downregulation of Myc-dependent target genes. Recently a number of highly specific inhibitors have been developed against the BET (bromo and extra terminal) family of bromodomains. The availability of selective BRD inhibitors had a significant impact on the validation of bromodomain-containing proteins as targets for drug development and for our understanding of the biological roles of these proteins.  “