title: Possible changes in tissue sensitivity in the age-dependent stimulation of DNA synthesis in vivo.
mesh_terms: D000375:Aging; D000818:Animals; D001835:Body Weight; D004247:DNA / Q000096:biosynthesis*; D007545:Isoproterenol / Q000008:administration & dosage / Q000378:metabolism / Q000494:pharmacology; D008297:Male; D051381:Rats; D013363:Submandibular Gland / Q000187:drug effects / Q000378:metabolism*; D013936:Thymidine / Q000378:metabolism; D013997:Time Factors; D014316:Tritium
chemical_list: D014316:Tritium; D004247:DNA; D007545:Isoproterenol; D013936:Thymidine