opIs34 [hus-1p::hus-1::GFP + unc-119(+)]. Low-copy integrated array of 1144 bp hus-1 promoter and genomic coding sequence fused to GFP. Nuclear expression of GFP in germ cells and embryos. Integrated GFP construct completely rescues DNA damage induced cell cycle arrest defect and partially rescues DNA damage induced apoptosis of hus-1(op241).