The following information accompanied stocks donated to the Bloomington Drosophila Stock Center by Christopher Potter, Johns Hopkins University School of Medicine.
P{10XQUAS(FRT.stop)CsChrimson.mVenus} consists of 10 copies of QUAS followed by a STOP cassette flanked by FRT, FRT3 and FRT5 sites. Downstream of the STOP cassette are coding sequences for CsChrimson fused to mVenus. Removal of the STOP cassette results in expression of CsChrimson fused to mVenus under the control of QUAS. Full construct description: 10xQUAS-FRT-FRT3-FRT5-SV40 terminator-Tubulin alpha terminator-FRT-FRT3-FRT5-CsChrimson.mVenus-SV40 terminator. The two transcriptional terminators in the STOP cassette are the same as those used to make P{QUAS(FRT.stop)mCD8-GFP.P} in FBrf0210697.
P{10XQUAS(FRT.stop)CsChrimson.mVenus}3a is a viable insertion on the third chromosome.