UASp regulatory sequences drive expression of csw containing the amino acid replacement R589M (this mutation is equivalent to the R465M mutation in the human ortholog Hsap\PTPN11, which is a mutation lacking phosphatase activity).
Flies expressing both cswY279C.Scer\UAS and cswR465M.Scer\UAS under the control of Scer\GAL4tub results in strong suppression of ectopic wing vein formation. The number of R7 photoreceptors is normal, along with ommatidial rotation.