According to PMID:18927627 https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1000222
phat-5 is expressed exclusively in g1AR and g1AL but not g1P.
"Previous reports have suggested that the g1AR and g1P cells are fused [9], yet we see no passage of phat-5-expressed YFP from g1AR to g1P, suggesting either that YFP is restricted from diffusing between these cells or that the two cells are not fused."
According to PMID:18927627 https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1000222 phat-5 is expressed exclusively in g1AR and g1AL but not g1P. "Previous reports have suggested that the g1AR and g1P cells are fused [9], yet we see no passage of phat-5-expressed YFP from g1AR to g1P, suggesting either that YFP is restricted from diffusing between these cells or that the two cells are not fused."