Widespread GFP expression was observed, in all stages, with many components. But in all strains obtained, individuals only showed a few components, presumably due to a high degree of mosaicism. Weak GFP expression was seen in many head neurons and tail neurons. Much weaker GFP expression was found in body wall muscle, intestine and spermathecae. GFP expression was weaker than for reporter gene fusions that tagged different specific
jun-1 transcripts at the start of the protein coding region. The absence of some expression pattern components that could be seen with transcript specific reporter gene fusion constructions might be due to the low level of expression seen with this fusion with gfp inserted at the end of the protein coding region.