The bicistronic wrm locus, which encodes the wrm1 and wrm2 open reading frames, is deleted (except for 160bp 3' untranslated sequences). A sequence cassette encoding a single attP site, a single loxP site and a Disc\RFPDsRed(T1).3xP3.cHa marker has been inserted in place of the deleted sequence.
TI{TI}wrm-ΔattP