This Week in Nature

In a paper published online in advance in Nature Genetics this week, a team led by investigators at Baylor College of Medicine reports its quantification of mRNA copy-number statistics from 20 E. coli promoters — via single-molecule fluorescence in situ hybridization — for the purpose of characterizing the general properties of transcriptional time series in the bacterium.

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23andMe's Anne Wojcicki ponders DNA and what it means to be human in a New York Times essay.

A new estimate places the last universal common ancestor to life on Earth as living 3.9 billion years ago, Inverse reports.

In PNAS this week: retinitis pigmentosa gene therapy, role of microbiome in growth stunting, and more.

Bloomberg reports that researchers and drug companies are modeling anti-obesity treatments after the rare genetic condition essential fructosuria.