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Science 23 March 2007:
Vol. 315. no. 5819, pp. 1673 - 1674
DOI: 10.1126/science.1141184
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Perspectives

IMMUNOLOGY:
Asymmetry and Immune Memory

Dan R. Littman1 and Harinder Singh2

Asymmetric cell division of lymphocytes ensures that our adaptive immune system maintains a balanced production of two different types of T cells.

1D. R. Littman is in the Howard Hughes Medical Institute, Skirball Institute of Biomolecular Medicine, New York University School of Medicine, New York, NY 10016, USA. E-mail: littman{at}saturn.med.nyu.edu

2H. Singh is in the Howard Hughes Medical Institute, Department of Molecular Genetics and Cell Biology, University of Chicago, Chicago, IL 60637, USA. E-mail: hsingh{at}uchicago.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)