Despite the presence of insulator sequences in TI{vas-Cas9.T2A.GFP,attP}, the Disc\RFPtdTom.3xP3 marker is not completely insulated from heterochromatic suppression in the TI{vas-Cas9.T2A.GFP,attP}SGyA insertion; the marker shows variable expression in this insertion line and often appears completely suppressed. Nevertheless, Cas9 expression from this insertion has been shown to be sufficient to allow guide RNA-based cleavage.
Despite the presence of insulator sequences in TI{vas-Cas9.T2A.GFP,attP}, the Disc\RFPtdTom.3xP3 marker is not completely insulated from heterochromatic suppression in the TI{vas-Cas9.T2A.GFP,attP}SGyA insertion; the marker shows variable expression in this insertion line and often appears completely suppressed. Nevertheless, Cas9 expression from this insertion has been shown to be sufficient to allow guide RNA-based cleavage.