Expression of an ap cDNA is driven by the ap dorsoventral enhancer 'DV', the early enhancer 'E' and a region around the ap transcription start site including the Polycomb Response Element (PRE) 'P'.
Expression of two copies of apcDNA.DV+E+P partially rescues the wing loss seen in apUGO35/aprK568 mutant flies. Wing rescue is not perfect: a clear dorsoventral margin is observed.