Construct: Contains the full-length ftz open reading frame, with the amino acid replacement: T263A, and ftz 5' and 3' sequences.
embryonic segment
Embryos carrying ftzT263A in a homozygous ftz13 background show variable segmentation defects. RP2 neurons are present and positioned normally in these embryos.
ftzT263A fails to rescue ftz11/ftz13