P{EP}jubEPG845 is inserted 163bp upstream of the jub translational start codon.
jubEPG845 mutants are lethal. However, expression of jub through the addition of Scer\GAL4αTub84B.PL (to drive expression in the epidermis) or Scer\GAL469B (to drive expression in nervous system) rescues the allele to viability.