The BCW Index recorded a 1.42 percent drop this past week, as 12 of the 16 components lost ground. Leading the group of decliners was Bruker BioSciences, which fell 6.1 percent.

Molecular Devices led the four firms that reported gains for the tracking period ended Tuesday, with an increase of 5 percent. The firm reported its fourth-quarter 2005 results earlier today (see briefs).

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The US Food and Drug Administration has new guidelines that enable some gene and cell therapies to undergo expedited review, according to the New York Times.

Using gene drives to control invasive species might be too risky, an initial advocate of the approach says.

In Science this week: intellectual property experts argue patent battles such as the one over CRISPR are wasteful, and more.

Researchers have grown tumors in 3D cell cultures to better understand cancer, the Economist reports.