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Journal of Experimental Medicine, Vol 177, 891-896, Copyright © 1993 by Rockefeller University Press
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H von Boehmer and K Hafen
Basel Institute for Immunology, Switzerland.
We have determined the life span of naive CD4-8+ T cells in T cell receptor transgenic mice. We find that such cells do not divide in secondary lymphoid organs in both normal euthymic mice and T cell- deficient mice. By both continuous labeling and by chasing pulse- labeled cells, we find that the minimum life span of the naive T cells is in the order of 8 wk.
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