title: An electron microscope autoradiographic study of the site of initial synthesis of RNA in the nucleolus of Smittia.
mesh_terms: D000818:Animals; D001345:Autoradiography; D002466:Cell Nucleolus / Q000378:metabolism*; D004247:DNA / Q000502:physiology; D004175:Diptera; D008854:Microscopy, Electron; D012313:RNA / Q000096:biosynthesis; D012270:Ribosomes; D013698:Templates, Genetic; D014316:Tritium; D014529:Uridine / Q000378:metabolism
chemical_list: D014316:Tritium; D012313:RNA; D004247:DNA; D014529:Uridine