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This Week in PNAS

In PNAS this week, Stanford University's Sebastian Maerkl and Stephen Quake study the evolution of transcription factors. In this work, they created all possible 95 single-point mutations of five DNA-contacting residues of Max, a human helix–loop–helix transcription factor, and then measured the DNA binding of each mutant.

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Bloomberg reports that the DNA-for-cash deal reported in Kentucky might be a more widespread scam.

St. Jude Children's Research Hospital scientists have treated infants with X-linked severe combined immunodeficiency using gene therapy in an early phase study.

St. Louis Public Radio reports that some African Americans are turning to DNA ancestry testing to help guide genealogical searches.

In Nature this week: a genomic analysis of the snailfish Pseudoliparis swirei, ancient DNA analysis gives insight into the introduction of farming to England, and more.