"... a Pxol-1::gfp reporter that expresses GFP specifically in XO embryos (Nicoll et al. 1997; Figure 1). Hermaphrodites are screened en masse to identify mutants that have green-fluorescent embryos in utero... we identified two (
me23 and
me45) containing mutations in predicted gene F09E8.3... which encodes... Msh5"