Insertion 8bp downstream of the translation start site, resulting in a premature stop codon.
Embryos derived from homozygous female germline clones show a "lawn-of-denticles" phenotype with some additional dorsalisation and twisting. The phenotype of embryos derived from these females is identical whether they are mated to rti1164A4/+ or Df(2L)yan-J2/+ males.