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Maintain at 20C or cooler. qIs26 [lag-2::GFP + rol-6(su1006)]. set-2 mutation balanced by glp-1- and dpy-19-marked recombination suppressor. qIs26 was integrated into qC1 and in the process made qC1 homozygous lethal. Heterozygotes are Rollers and GFP+ in the distal tip cell, and segregate WT Rol, lethal qC1 homozygotes, and set-2(bn129) homozygotes (Mrt phenotype at 25C -- viable but homozygotes will become sterile in successive generations). Pick WT GFP+ Rol and check for correct segregation of progeny to maintain. set-2(bn129) homozygotes are short-lived on OP50. bn129 is a deletion removing 748 bp from exon 11 of SET-2L and from exon 3 of SET-2S resulting in a frameshift after 885 aa of SET-2L and after 117 aa of SET-2S with a premature stop four codons later. References: Robert VJ, et al. Front Cell Dev Biol. Dec 2020 Sep 22:8:561791. doi: 10.3389/fcell.2020.561791. PMID: 33072747. Xiao Y, et al. Proc Natl Acad Sci USA. 2011 May 17;108(20):8305-10. doi: 10.1073/pnas.1019290108. PMID: 21527717.