This Week in PNAS

In the PNAS Early Edition this week, researchers in New Hampshire and Ohio report that cofactor molecules are an integral part of infectious prions. The team shows that withdrawal of cofactor molecules during serial propagation of purified recombinant prions causes a reduction in specific infectivity and an adaptation of prions containing misfolded proteins.

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National Geographic reports that marine mammals have lost a gene that could make them more susceptible to organophosphate damage.

NPR reports on Human Cell Atlas Consortium's effort to catalog all the different cell types within the human body.

The Union of Concerned Scientists surveyed US government scientists about Trump Administration policies and more, Science reports.

In PNAS this week: history and genetic diversity of the scarlet macaw, approach for predicting human flu virus evolution, and more.