hpIs190 [nmr-1p::D3cpv + lin-15(+)]. Strong fluorescent marker for Ca2+ imaging (FRET) AVA, AVE, AVD, RIM and a few other neurons. Construct includes 5.1 kb nmr-1 genomic promoter sequence upstream of the ATG start codon but a excludes a 2 kb fragment encoding cex-1 that interferes with calcium imaging (Kawano and Zhen, unpublished observation). Reference: Kawano T, et al. Neuron. 2011 Nov 17;72(4):572-86. PMID: 22099460