A small cytoplasmic, non-membranous RNA/protein complex aggregate in the primordial germ cells that are distinct from, but colocalize with or are adjacent to, P granules and mutator foci and are associated with RNA metabolism. Z granules have been observed in C. elegans.
Source:
GOC:dr,
GOC:krc,
PMID:32650583,
PMID:29769721,
PMID:31378614