The loxP cassette containing a Disc\RFP3xP3.PB marker has been excised from M{vas-Cas9}, generating M{vas-Cas9.RFP-}. The Avic\GFPE.3xP3 marker is still present.
vas regulatory sequences drive expression of mammalian-codon-optimised Cas9 endonuclease which is tagged with a nuclear localization signal (Tag:NLS(Unk)).