Transcription factor involved in imaginal disks development. Isoform rn is required in the wings, antenna, haltere, proboscis and legs disks, while isoform roe is required in the eye disk. Together with nab corepressor, it is involved in the initiation and maintenance of wingless (wg) expression in the wing hinge, by limiting the expression of wg to this compartment. Also required for the epithelial-mesenchymal transition branch of basolateral junctions signaling. Interacts with nab; which acts as a corepressor. Isoform rn and isoform roe are expressed in non-overlapping domains in the larval imaginal disks. Isoform rn is first expressed during the early third larval instar in the leg, wing, haltere and antennal part of the eye-antennal imaginal disk. It is observed as a ring in the leg and antenna disks and in the presumptive wing pouch and capitellum of wing and haltere disks respectively. In wing disk it isexpressed in 3 concentric domains in the wing pouch. In late third instar, expression of isoform rn in the leg disk is no longer evident, but is maintained in the other disks. Isoform roe appears in the third instar and is confined to the eye part of the eye-antennal imaginal disk in a band of 4-6 cells at the morphogenetic furrow. There is no evidence of roe expression in other imaginal disks. Produced by alternative promoter usage. Belongs to the krueppel C2H2-type zinc-finger protein family.