Shares in Bruker BioSciences declined 12 percent for the five-day trading period ended Tuesday. The firm's stock dropped steadily from closing at $5.43 last Wednesday to $4.75 at the close of trading on Tuesday, with trading volume unusually high over the last few days. The only news from the firm was a molecular diagnostics alliance announced on Tuesday (see Briefs).

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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.