UAS regulatory sequences drive expression of a mutant form of fj, with the amino acid replacement: D490Q.
fjD490Q.UAS/Scer\GAL4αTub84B.PL fails to rescue fjd1
Expression of fjD490Q.Scer\UAS under the control of Scer\GAL4αTub84B.PL does not rescue the reversal of hair polarity that is seen behind fjd1 clones in the dorsal adult abdomen.