Bromodomain-containing protein 9 is a protein that in humans is encoded by the BRD9 gene.
BRD9 contains a bromodomain. It is closely related to BRD7. BRD9 is present in some SWI/SNF ATPase remodeling complexes.
The BRD9 gene is frequently present in variable copy number in lung cancer.
Small molecules capable of binding to the bromodomain of BRD9 have been developed.