15 amino acid deletion removing the most conserved portion of en-homology region 1.
Deletion of amino acids 172 to 186 (partial deletion of the core of the eh1 homology).
After a 15 minute heat shock few embryos fail to hatch. Embryonic cuticle shows no ftz-dependent defects.
Carried in plasmid "pEFEΔeh1", expressed in S2 cells and competition for ftz binding sites on a Ecol\CAT reporter plasmid is studied.