This Week in PNAS

In a paper appearing in the early, online edition of the Proceedings of the National Academy of Sciences, researchers from the Institute for Systems Biology, the University of California, San Diego, the National Institute of Mental Health Intramural Research Program, and elsewhere describe a role for rare changes to genes involved in neuronal excitability in bipolar disorder.

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Berkeley researchers have engineered yeast to make the molecule behind the hoppy taste of beer, Quartz reports.

King's College London researchers examine the influence of school type and genetics on academic achievement.

FiveThirtyEight writes that most who take a direct-to-consumer BRCA1/2 genetic test won't learn much from it.

In Science this week: early life experience influence somatic variation in the genome, and more.