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This Week in PLoS

Columbia University scientists have used microarray analysis to study the effects of epigenetic influences and gene expression patterns on behavioral variability. Using genetically identical mice, their work, published in PLoS ONE this week, shows that variability in large-scale organization of gene expression levels in the hippocampus, rather than differences in the expression levels of specific genes, is associated with individual differences in behavior in the mice.

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St. Jude Children's Research Hospital scientists have treated infants with X-linked severe combined immunodeficiency using gene therapy in an early phase study.

Bloomberg reports that the DNA-for-cash deal reported in Kentucky might be a more widespread scam.

St. Louis Public Radio reports that some African Americans are turning to DNA ancestry testing to help guide genealogical searches.

In Nature this week: a genomic analysis of the snailfish Pseudoliparis swirei, ancient DNA analysis gives insight into the introduction of farming to England, and more.