A set of third chromosome mutant stocks derived by insertional mutagenesis using the P-element construct P{lacW}; most lines have a lethal or semi-lethal phenotype. The P{lacW} construct carries a w+mC mini-white visible marker, Ecol\lacZ enhancer trap sequences, and bacterial sequences that allow plasmid rescue (FBrf0049800).
The insertion site is reported to be 82 bp upstream of the transcription start of SNF4Aγ-RL, which no longer exists as a FlyBase annotation but mapped to 3R:21204873 in R6 coordinates (see FlyBase R5.12 archive).
The orientation of the insertion was not reported.