mdIs126 [snt-1p::snt-1(genomic; B-stop)::CFP]. mdIs129 [snt-1p::snt-1(genomic; A-stop)::YFP]. snt-1 mutation in genome is rescued by 2 integrated transgenes. snt-1(genomic; B-stop) = complete snt-1 genomic region with an in-frame stop codon engineered into exon 6B; also referred to as "snt-1(A only)." snt-1(genomic; A-stop) = complete snt-1 genomic region with an in-frame stop codon engineered into exon 6A; also referred to as "snt-1(B only)." Reference: Mathews EA, et al. Mol Cell Neurosci. 2007 Apr;34(4):642-52.