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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A fire at a Manchester hospital may have destroyed lab equipment and data, the Guardian reports.

Researchers generate a genetic database from skeletal remains from the 1845 Franklin Expedition to the Arctic, Live Science reports.

Researchers in China have begun another trial using CRISPR/Cas9 approaches in cancer patients, according to the Wall Street Journal.

In Science this week: human DNA found in sediments from archeological sites lacking bones, and more.