[Lin R] Pop (posterior pharynx defective) phenotype: maternal lethal, causing MS blastomere to adopt the fate of sister blastomere E; resulting embryos have twice the wildtype amount of gut. zu189 isolated in mutator background, probable Tc1 insertion.
[C.elegansII] zu189mut : maternal effect embryonic lethal,no MS-derived pharyngeal cells; MS blastomere adopts the fate of sister blastomere E; resulting embryos have twice the wildtype amount of gut. NA1. Cloned: encodes predicted 487 aa protein with HMG box; antibody stains nuclei of oocytes, early blastomeres. [Lin et al. 1995; JJ]