期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1979
卷号：76
期号：4
页码：1677-1681
DOI：10.1073/pnas.76.4.1677
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：The topography of endogenous type C viral sequences in mouse cellular DNA was investigated by EcoRI nuclease restriction and application of the Southern blotting technique. The DNAs from one outbred and five inbred strains were resolved into 20-35 fragments containing viral sequences, distributed in unique, though related, patterns for each mouse strain. Different normal tissues from the same animal were indistinguishable in their DNA patterns, suggesting that tissue differentiation is not associated with gross alteration in the topography of endogenous type C virus sequences. Tumor tissues from spontaneous lymphomas of AKR/J mice were similarly analyzed. In four out of seven individual tumors we detected the emergence of one or two new virus-containing DNA fragments. The mass of these fragment varied, indicating different insertion sites of the new viral sequences. The detection of these new viral sequences suggests that each tumor was composed of descendents of only one or a few cells.
