Sequence encoding the N-terminal 18 amino acid resides (which includes the conserved N-terminal NPAF motif) has been deleted.
Expression of spdoΔN18.Scer\UAS.T:Avic\GFP-EGFP under the control of Scer\GAL4sca-DB rescues the wild-type bristle pattern in spdoC55 clones in the thorax.