Balancer recombination happens frequently at 23-25C, strain must be maintained at 16-20C. Homozygous lethal mutation balanced by myo-2p::Venus-marked inversion. Heterozygotes are wild-type with somewhat dimmer Venus signal and segregate WT Venus(+) heterozygotes, Mec Unc Venus(+) tmC5 homozygotes, and non-Venus rps-23(cc5994) homozygotes (L1 arrest). Pick wild-type Venus(+) and check for proper segregation of progeny to maintain. cc5994 is an engineered mutation creating an early stop (A67*). Presumptive rps-23 null. Heterozygous rps-23(cc5994)/tmC5 animals are delayed in development. Check for proper segregation of progeny. Reference: Cenik ES, et al. Dev Cell. 2019 Mar 25;48(6):811-826.e6. doi: 10.1016/j.devcel.2019.01.019. PMID: 30799226.