In second instar eye-antenna discs, elB and noc expression is restricted to the eye primordium. In early third instar discs, expression in the distal part of the antenna primordium is observed. In the eye-head primordium, elB and noc are expressed in the hth domain that indicates the proliferative region. In late third instar larval discs, expression levels remain high in the region anterior to the morphogenetic furrow, at more elevated levels in cells that co-express hth and tsh and at lower levels in the pre-proneural region. Thus elB and noc are expressed at higher levels in the proliferative region of the eye-head primordium.