Remobilisation of the progenitor insertion.
Suv4-20SP dominantly suppresses variegation of the w gene caused by In(1)wm4 and P{RS5}5-HA-1992.
Suv4-20SP does not dominantly suppress variegation of the w gene caused by P{RS5}5-HA-1902, T(2;3)V21-P{lacW}92E.x3 or P{RS3}panCB-5204-3.