Sameshima, M Effects of 6-azauridine on the embryonic cells of Xenopus laevis, with special reference to nucleolar ultrastructure. [electronic resource] - The Journal of experimental zoology Mar 1969 - 333-40 p. digital Publication Type: Journal Article ISSN: 0022-104X Standard No.: 10.1002/jez.1401700310 doi Subjects--Topical Terms: AnimalsAnuraCarbon IsotopesCell Nucleolus--drug effectsDactinomycin--pharmacologyEmbryo, Nonmammalian--drug effectsEndoplasmic ReticulumMicroscopy, ElectronMitochondriaNucleosides--metabolismProtein Hydrolysates--metabolismRNA--biosynthesisTriazines--pharmacologyTritium