XhoI-SalI fragment contains the fs(1)Ya transcription unit and most of the fs(1)Yb transcription unit, and rescues fs(1)Ya2 but not fs(1)Yb1. fs(1)Ya+7.2 is the same construct as fs(1)Ybt7.2 and fs(1)Ya+t6.5. Position of restriction fragment on reference sequence inferred by FlyBase curator
Alteration in 5' splice donor site
fs(1)Ya+t7.2 rescues fs(1)Ya2
fs(1)Ya+t7.2 rescues fs(1)Ya2