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Induction of virus by these drugs is several orders of magnitude greater than that obtained with any other treatment tested. These studies indicate that the full genome of murine leukemia virus is present in an unexpressed form in all AKR cells and provide a potentially powerful technique for activating leukemia virus genomes in other cell systems.<\/jats:p>","DOI":"10.1126\/science.174.4005.155","type":"journal-article","created":{"date-parts":[[2006,10,5]],"date-time":"2006-10-05T13:17:43Z","timestamp":1160054263000},"page":"155-156","source":"Crossref","is-referenced-by-count":451,"title":["Murine Leukemia Virus: High-Frequency Activation in vitro by 5-Iododeoxyuridine and 5-Bromodeoxyuridine"],"prefix":"10.1126","volume":"174","author":[{"given":"D. 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