The following information accompanied stocks donated to the Bloomington Stock Center by Peter Gallant, University of Würzburg. 
P{Sym+tGa} is a genomic rescue transgene for Symplekin. It was constructed using pP{CaSpeR-4}.
P{Madm+tGa} is a genomic rescue transgene for Madm. It was constructed using pP{CaSpeR-4}.
P{Sym+tGa}2 and P{Madm+tGa}2 are second chromosome insertions.
Df(3R)30m1 and Df(3R)16m2 were generated by imprecise excision of a P{EP} insertion located 719 nucleotides upstream of the the Sym ATG. Both deletions have breakpoints within Sym and Madm, producing the null alleles Sym30m1, Madm30m1, Sym16m2 and Madm16m2.
Combining the transgenes and the deletions allows one to recover flies mutant for only Sym or Madm.