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This Week in PNAS

In this week's PNAS, research led by Stanford University scientists studied antibodies to β-amyloid (Aβ) proteins on a large scale. Using peptide arrays on plasma samples and cerebrospinal fluid of patients with Alzheimer's disease, they found natural antibodies against known toxic Aβ and amyloidogenic non-Aβ peptides and that these antibodies decrease with age and advancing Alzheimer's.

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Australia will not be regulating gene editing of plants, animals, and human cell lines as long as no new genetic material is incorporated, reports Nature News.

The Washington Post reports that the US Department of Agriculture told its researchers to label peer-reviewed articles as "preliminary" work.

Researchers have sequenced the genomes of both the coast redwood and the giant sequoia, according to the San Francisco Chronicle.

In PNAS this week: study of epigenetic patterns in mammalian eggs, clonal expansion patterns in CD8+ T cells, and more.