title: [A and C particles in mouse embryos].
abstract: Electron microscopic examination of embryos of the BALB/c and AKR strains of mice from the 1-cell stage to 14 days of age revealed 2 types of intracisternal A particles, one type of C particle budding into the extracellular space and an endoplasmic reticulum-association "dense-cored veiscle". The occurrence of the particles showed a marked dependence on the developmental stage of the embryo. A small percentage of 1 blastomere embryos in both strains showed the presence of a small number of A particles. Embryos of 1 to 16 blastomeres of the AKR strain with A particles were on average more frequent than in the BALB/c strain. The percentage of 7 and 14 day embryos with C particles was much greater in AKR than in Balb/c mice.
mesh_terms: D000818:Animals; D004622:Embryo, Mammalian / Q000648:ultrastructure*; D004721:Endoplasmic Reticulum / Q000648:ultrastructure; D005260:Female; D007181:Inclusion Bodies, Viral / Q000648:ultrastructure*; D051379:Mice; D008806:Mice, Inbred AKR; D008807:Mice, Inbred BALB C; D011247:Pregnancy
vernacular_title: Expression des particules A et C dans les embryons de Souris.