wtfIs145 [rab-3p::his-24::GCaMP6s::unc-54 3' UTR + pBX]. wtfIs348 [pAS3-5xQUAS::(delta)pes-10p::AI::gur-3G::unc-54 3' UTR + pAS3-5xQUAS::(delta)pes-10p::AI::prdx-2G::unc-54 3' UTR + pAS3-rab-3p::AI::QF+GR::unc-54 3' UTR + unc-122::GFP]. Keep plates covered to avoid unnecessary exposure to light. This strain expresses a purple light-sensitive optogenetic protein system (i.e., GUR-3 and PRDX-2) in each neuron, and GFP in coelomocytes. GCaMP6s transgene allows for imaging whole-brain calcium activity with neuronal identification using NeuroPAL system. unc-31(wtf502) is a CRISPR-engineered deletion allele. See description of strain OH15262 for full description of otIs669 NeuroPAL (Neuronal Polychromatic Atlas of Landmarks) transgene (Yemini E, et al. Cell. 2021 Jan 7;184(1):272-288.e11. PMID: 33378642). Derived by out-crossing parental strain OH15262 an additional six times before incorporating other transgenes. Reference: Randi F, et al. Nature 2023 Nov;623(7986):406-414. doi: 10.1038/s41586-023-06683-4. PMID: 37914938.