In wild-type zygotes, PAR-3, PAR-6, and PKC-3 become localized to the anterior cell cortex and PAR-1 and PAR-2 become localized to the posterior cortex. The extent of PAR-2 staining at the cell cortex in
par-5 embryos is expanded, entering the anterior end of the embryo, but is most concentrated in one or two small patches on the posterior cortex.