Three copies of a mutated +2' element from the nos 3' UTR are inserted within the αTub84B 3' UTR sequences of nosαTub84B.UTR.Tag:HA.
2% of embryos derived from nosBN females which are also expressing nosnos.+2'A-3X.T:Ivir\HA1 have anterior defects.
nosnos.+2'A-3X.T:Ivir\HA1 rescues the abdominal segmentation defect of embryos derived from nosBN females; 100% of the embryos develop 7-8 abdominal segments.