risIs31 [hsp-16.2p::grh-1b::GFP + unc-119(+)]. Long lived without heat shock. Heat shock induces over-expression of grh-1 causing short-lived phenotype and nuclear GFP expression. Described as "hsp-16.2p::grh-1::gfp OEx line 1" in referenced paper. Reference: Grigolon G, et al. Nat Commun. 2022 Jan 10;13(1):107. doi: 10.1038/s41467-021-27732-4. PMID: 35013237.