Internal deletion of a 630bp NarI-SpeI fragment (between 1325 and 1955, amino acids 355-564).
Heat induced expression causes bristle duplications and socket to shaft transformations. Sometimes extra campaniform sensilla are observed on L3, extra bristles are present on the wing tip and extra veins and deltas are observed.
Carried in plasmid "C3" and expressed in S2 cell culture to test for proper protein expression.