Downstream effector of Notch signaling. Transcriptional repressor which binds preferentially to the canonical E box sequence 5'-CACGTG-3'. Acts as a suppressor of neurogenesis by antagonizing proneural gene function. Functions during floorplate development. Plays a role in pronephros formation in the inhibition of distal tubule and duct cell fates and the promotion of glomus and proximal tubule formation