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Science 21 September 2007:
Vol. 317. no. 5845, pp. 1696 - 1697
DOI: 10.1126/science.1149533
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Perspectives

DEVELOPMENTAL BIOLOGY:
Home for the Precious Few

Steve DiNardo1 and Robert E. Braun2

Live imaging reveals that branching of blood vessels in the mammalian testes may define the location of niches for germline stem cells.

1S. DiNardo is in the Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, PA 19104-6058, USA. E-mail: sdinardo{at}mail.med.upenn.edu

2R. E. Braun is in the Department of Genome Sciences, University of Washington, Seattle, WA 98195-7730, USA. E-mail: braun{at}washington.edu

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