Insertion of a P{GS} element at -923bp (relative to the transcription start site).
Flies expressing P{GS}Act5CGS1131 under the control of Scer\GAL429BD show semi-lethality and the aristae are missing. Flies expressing P{GS}Act5CGS1131 under the control of Scer\GAL4c355 show semi-lethality and the number of hairs is reduced. Flies expressing P{GS}Act5CGS1131 under the control of Scer\GAL4hs.2sev show semi-lethality and have rough eyes. Flies expressing P{GS}Act5CGS1131 under the control of Scer\GAL4dpp.blk1 show semi-lethality and lack the anterior crossvein.