The DNA binding residues of the HD domain have been disrupted (amino acid replacements S281A and N282A).
Coexpression of the transgenes eygmHD.Scer\UAS and eygmPD.Scer\UAS, driven by Scer\GAL4dpp.blk1, results in the induction of an extra ventral in the ventral head region. Unlike overexpression of wild-type eyg, expression of eygmHD.Scer\UAS, under the control of Scer\GAL4dpp.blk1, does not cause extra ventral eye formation.
eygmHD.UAS/Scer\GAL4eyg-22-2 partially rescues eyg22-2/eygM3-12
Expression of the eygmHD.Scer\UAS transgene in a eyg22-2/eygM3-12 background leads to the full rescue of eyes in 21% of mutants. The mutant thorax is fully rescued, although there are still many extra macrochaetes at lateral regions. Coexpression of the transgenes eygmHD.Scer\UAS and eygmPD.Scer\UAS in a eyg22-2/eygM3-12 background fully rescues the mutant eye and thorax phenotypes.