The recent identification of a smaller non-canonical BAF complex (ncBAF, or GBAF) in mouse and human cancer cell lines by Alpsoy and Dykhuizen showed that this BAF subcomplex is defined by the exclusion of several canonical BAF subunits and the inclusion of two unique subunits, bromodomain-containing 9 (BRD9) and mutually exclusive paralogs GLTSCR1 and GLTSCR1L (for glioma tumor suppressor candidate region gene 1 and gene 1 like) [11]. Here, BRD9 is linked to cancer.