title: [Appearance of a factor stimulating oocyte maturation in the karyoplasm of the oocytes of the green toad, the clawed toad and the starred sturgeon].
abstract: The karyoplasm (the contents of germinal vesicle) of the Bufo viridis, Xenopus laevis, and Acipenser stellatus oocytes maturing under the influence of progesterone acquires the ability to induce the maturation (germinal vesicle breakdown) of the full grown oocytes, when injected into them. This ability arises in the karyoplasm earlier than in the cytoplasm and is preserved until the germinal vesicle breakdown.
mesh_terms: D000818:Animals; D002025:Bufonidae; D002467:Cell Nucleus / Q000502:physiology; D003593:Cytoplasm / Q000502:physiology; D005260:Female; D005399:Fishes; D006133:Growth Substances / Q000494:pharmacology*; D016200:Maturation-Promoting Factor; D009865:Oocytes / Q000187:drug effects / Q000254:growth & development*; D011374:Progesterone / Q000494:pharmacology; D013268:Stimulation, Chemical; D013997:Time Factors; D014982:Xenopus laevis
chemical_list: D006133:Growth Substances; D011374:Progesterone; D016200:Maturation-Promoting Factor
vernacular_title: Vozniknovenie faktora, stimuliruiushchego sozrevanie ootsitov, v karioplazme ootsitov zelenoĭ zhaby, shportavoĭ liagushki i sevriugi.