This Week in PNAS

This week in PNAS, researchers describe their ultrahigh-throughput screening platform that uses drop-based microfluidics to overcome the limitations of traditional methods employed to measure biochemical reactions. The team applied their method ― which uses "aqueous drops dispersed in oil as picoliter-volume reaction vessels" ― to directed evolution; they identified novel mutants of enzymes.

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Researchers have treated an X-linked genetic disease affecting three babies in utero, Stat News reports.

The Associated Press reports that the US Centers for Disease Control and Prevention is beefing up sequencing as a tool to investigate foodborne illnesses.

Researchers have sequenced samples from ancient toilets to study past eating habits and health, NPR reports.

In Nature this week: ash dieback disease fungal genome, and more.