Plays a role in somitogenesis. Essential for transcriptional repression of the segmental patterning genes, thus terminating the segmentation program in the presomitic mesoderm, and also required for the maintenance of rostrocaudal polarity in somites (By similarity). The ripply homology domain is required for transcriptional repression. The WRPW motif is required for binding to TLE/GROUCHO proteins. Belongs to the ripply family. Intron retention.