Position of restriction fragment on reference sequence inferred by FlyBase curator.
su(Hw)V P{CaSX/K5.3} combination is viable as the lethality associated with Df(3R)su(Hw)V (due to deletion of RpII15) has been rescued by transformation with a 5.3kb genomic fragment of RpII15.
Polr2I+t5.3 rescues Polr2IV
Rescues the lethality of Df(3R)su(Hw)V.