zuEx181[his-72(1kb 5' UTR)::YFP::GSRPVAT::HIS-72::HIS-72 (1KB 3'UTR) + 5.7 kb XbaI - HindIII UNC-119(+)]. HIS-72::YFP signal can be detected in the germline and most somatic nuclei, but not in intestinal nuclei.