This Week in Cell

Researchers with Harvard University's FAS Center for Systems Biology report on changes to the human gut microbiome associated with the use of xenobiotics. The team followed human gut microbiomes in three individuals taking xenobiotic compounds over nine months, using a combination of 16S ribosomal RNA sequencing, microbial community gene expression experiments, and flow cytometry to test the individuals' fecal samples.

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Microsoft co-founder Paul Allen also contributed to brain research, NPR reports.

The New York Times reports on the shifting interpretations of what some genetic variants mean over time.

In Cell this week: investigation of metastatic tumor evolution, more than 16,000 genetic variants introduced into the budding yeast model organism, and more.

MIT's Technology Review reports on Genentech's pursuit of personalized cancer vaccines.