wtfIs491 [inx-1p::twk-18(gf)::mCherry + unc-122p::RFP]. AIB(-) activated potassium channel. Expression of twk-18 gain-of-function mutant in AIB neurons causes permanent inhibition. RFP expression in coelomocytes. Reference: Chen KS, et al. Olfactory learning alters navigation strategies and behavioral variability in C. elegans. ArXiv, Feb 23:arXiv:2311.07117v2. PMID: 38013890.