Probable transcription factor that can both act as an activator or a repressor depending on the context (By similarity). Involved in posterior spiracle development. Acts downstream of ems and cut in posterior spiracle development. In embryos, it is expressed in posterior spiracles and peripheral nervous system. Expressed throughout life. Expressed in embryos, first- and third-instar larvae, late pupae and adults. Flies display a structurally abnormal 'filzkoerper' part of the posterior spiracles. They die during larval stage, possibly due to spiracular defects. Belongs to the krueppel C2H2-type zinc-finger protein family.