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This Week in PNAS

In the PNAS Early Edition this week, researchers at Michigan State University and their colleagues show that Pack-Mutator-like transposable elements "specifically acquire GC-rich fragments and preferentially insert into the 5' end of genes" in Arabidopsis, which they say "may influence the conformation of chromatin, the expression level of genes, as well as the recombination rate." These Pack-Mutator-like transposable elements — or Pack-MULEs — "form independent, GC-rich tr

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Researchers trace DNA on a clay pipe found at a former slave site to a population that lives in what is now Sierra Leone, the Washington Post reports.

Japan is to release rules governing some gene-edited food, according to NHK World.

Two researchers report on their genetic analysis of samples from a shawl thought to belong to a victim of Jack the Ripper, ScienceInsider reports.

In PLOS this week: computational strategy for improving gene set analysis testing, miRNAs linked to sleep apnea, and more.