Mutations in the human
BRCA2-repair
Mutations in the human BRCA2 gene are associated with susceptibility to early-onset breast cancer, but it is unclear how the wild-type BRCA2 protein works. In the July 17 Proceedings of the National Academy of Sciences, Xia et al. describe investigation of the role of BRCA2 in DNA repair (Proc Natl Acad Sci USA 2001, 98:8644-8649). They expressed BRCA2 in Capan-1 carcinoma cells, the only human cell line that has non-functional BRCA2. BRCA2 expression increased homologous recombination ten-fold,

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Jonathan Weitzman
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