Contained within an approximately 12kb genomic SalI fragment.
position of restriction fragment on reference sequence inferred by FlyBase curator
U2af38ΔE18 U2af50XR15 double mutants can be rescued by a combination of U2af50+tS12 and U2af38+t10.
U2af50+tS12 rescues U2af50XR15
U2af50+tS12 rescues U2af509-21
Rescues the lethality of U2af509-21.