Autoradiography by electron microscopy.
D000818:Animals; D001345:Autoradiography; D007413:Intestinal Mucosa / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D008722:Methods; D051379:Mice; D008854:Microscopy, Electron; D051381:Rats; D013936:Thymidine / Q000378:metabolism; D014316:Tritium
D014316:Tritium; D013936:Thymidine