UAS regulatory sequences drive expression of residues 1-800 (N-terminus) of jvl, tagged with GFP.
jvlN.UAS.GFP/Scer\GAL4VP16.nanos.UTR partially rescues jvl1/Df(3R)Exel6275
jvlN.UAS.GFP/Scer\GAL4sca.PU fails to rescue jvlf00590/jvl1