Fragment containing the ref(2)Pp transcription unit.
ref(2)Pdpp'.Pa.cCMa is restrictive for sigma virus multiplication.
ref(2)Pdpp'.Pa.cCMa rescues ref(2)Pod3/Df(2L)E55
ref(2)Pod3/Df(2L)E55 males carrying ref(2)Pdpp'.Pa.cCMa are fertile.