This Week in Cell

An international team led by investigators at the University of Montana used genome and transcriptome sequencing to untangle some of the genes involved in a three-way symbiotic relationship involving Tremblaya princeps bacteria that live inside mealybugs and another bacterial species that acts as an endosymbiont to some that bacteria. Results of the researchers' assessment suggest the mealybug genome houses 22 or more genes nabbed from bacteria through horizontal gene transfer.

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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.