Lethal at the early larval stage.
PBac{CH321-22I15} completely restores viability in Df(3R)rpk-Karyβ3 animals.
Df(3R)rpk-Karyβ3 animals carrying PBac{CH321-22I15.Δrpk} are viable at larval stages, but have somewhat reduced viability at the adult stage.