Construct: Nucleotide substitution: U51A. Mutation in stem-loop III of the nos TCE sequences. Coordinates of nucleotide substitution are relative to the start of the nos 3' UTR sequences. Also has a mutation in stem-loop II of the nos TCE sequences.
nosnos.IIA:U+U51A fails to rescue the abdominal segmentation defect of embryos derived from nosBN females; 70% of embryos have no abdominal segments and 30% have 1-3 abdominal segments.