P{DB1-ST} encodes Spyo\Cas9dCas9::VPR.αTub84B.short.Tag:FLAG and two ubiquitously expressed sgRNAs (that target eve and hid respectively).
A short αTub84B promoter fragment drives expression of the dCas9::VPR transcriptional activator. The driver is tagged at the N-terminus with 3xTag:FLAG and a nuclear localization signal.