a-d, Confocal fluorescence micrographs
showing the localization of RPA-1::YFP in ABplpappap (arrowhead) in
ced-3(lf);
ltIs44[Ppie-1::mCherry::PH];
opIs263[Prpa-1::rpa-1::YFP]
embryos after the indicated RNAi treatment. Inset, magnified view of
ABplpappap. A, anterior; R, right. e, Genes identified as
suppressors of the sterility of lrr-1(lf) mutants (ref. 19)
were tested for suppression of cell extrusion. f, Nomarski
micrograph showing cells extruded (arrow) from a wild-type embryo after
gmpr-1(RNAi) treatment. Scale bars, 10 μm.