In the absence of Notch signaling, the BRM complex maintains the accessibility of Notch-responsive enhancers to allow Su(H) recruitment by promoting nucleosome turnover. When Notch signaling is activated, the nucleosome turnover at Notch-responsive enhancers increases, increasing the accessibility of the chromatin and allowing more Su(H) to bind. The BRM complex is essential for the process to occur. Target genes are activated via co-activators. 