Homozygous viable. Modification of endogenous erm-1 locus mimics non-phosphorylated ERM-1(T544). Variant affects ERM-1 localization and dynamics. Reduced brood size, increased embryonic and larval lethality. Reference: Ramalho JJ, et al. Development. 2020 Jul 22;147(14):dev188011. PMID: 32586975