The P{EP} element has an internal deletion from bps 18-5020.
Slbp15, mute1281/mute[+] has embryonic/larval somatic muscle cell phenotype
Slbp15/Df(3R)3450 is rescued by Slbp+tSa
Slbp15/Df(3R)3450 is partially rescued by SlbpT120A.T230A.Tag:HA
Slbp15/Df(3R)3450 is partially rescued by SlbpWT.Tag:HA
Slbp15/Df(3R)3450 is partially rescued by SlbpT120A.Tag:HA
Slbp15/Df(3R)3450 is partially rescued by SlbpT230A.Tag:HA
Slbp15/Df(3R)3450 females rescued by one copy of SlbpWT.T:Ivir\HA1 are either fertile, moderately fertile, or sterile, depending on the insertion site of SlbpWT.T:Ivir\HA1. All rescued males are fertile. Females rescued by two copies of SlbpWT.T:Ivir\HA1 are fully fertile. Flies rescued by one copy of SlbpWT.T:Ivir\HA1 are sometimes late-eclosing, depending on the particular insertion. Two copies of the SlbpT120A.T:Ivir\HA1 transgene fully rescues the viability and fecundity of Slbp15/Df(3R)3450 flies. The viability of Slbp15/Df(3R)3450 mutants with one copy of SlbpT120A.T:Ivir\HA1 is usually rescued, depending on insertion of the transgene. Females rescued with one copy of SlbpT120A.T:Ivir\HA1 can be sterile or fertile, depending on the insertion, while males are always fertile. Two copies of either the SlbpT230A.T:Ivir\HA1 or the SlbpT120A.T230A.T:Ivir\HA1 transgene partially rescue the viability of Slbp15/Df(3R)3450 mutants, but any rescued females are sterile. One copy of SlbpT230A.T:Ivir\HA1 or SlbpT120A.T230A.T:Ivir\HA1 is not usually sufficient to achieve rescue; any escapers eclose later then wild type and usually die shortly after eclosion. All rescued males are fertile.
An allelic series can be defined for Slbp alleles with respect to viability: Slbp10 > Slbp19 > Slbp15 >= Slbp12 = Df(3R)3450.