title: Uptake of putrescine by Tetrahymena.
mesh_terms: D001345:Autoradiography; D002082:Butylamines / Q000032:analysis / Q000378:metabolism*; D002467:Cell Nucleus / Q000378:metabolism; D046508:Culture Techniques; D004247:DNA / Q000378:metabolism; D006358:Hot Temperature; D008854:Microscopy, Electron; D008928:Mitochondria; D011073:Polyamines; D013768:Tetrahymena / Q000378:metabolism*; D014316:Tritium
chemical_list: D002082:Butylamines; D011073:Polyamines; D014316:Tritium; D004247:DNA