Inhibitors targeting the bromodomain proteins are already being used in the clinic, such as Resverlogix’s apabetalone, in phase 3 trials for cancer and phase 1 for pulmonary arterial hypertension; AbbVie’s ABBV-744, in phase 1 for cancer; and Constellation Pharmaceuticals’ CPI-0610, in phase 2 for cancer, suggesting that BRD2 inhibitors can be used as drug candidates. Here, BRD2 is linked to cancer.