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mathematician Yuval Peres. New Research In, physical Sciences, featured Portals, articles by Topic, biological Sciences. Researchers report early metal use and crematory practices by indigenous groups in the southeastern United States. Intergenerational trends in status mobility, a study exploring intergenerational social mobility in the United States finds that fewer people born in the 1980s were upwardly mobile than those born in the 1940s and that the slowing of status mobility accentuates inequalities of opportunity. Front Matter, news Feature: Whats the best way to build a molecular machine? Researchers report evidence in yeast cells that nucleosomes inhibit binding and cleavage by the genome-editing enzyme crispr-Cas9, suggesting nucleosome position maps might help improve genome-editing efficiency. Click here for articles from the Artificial Molecular Machines Special Feature. Chemists are tinkering with a variety of different designs and means of propulsion, though practical uses for these mini-motors have yet to be realized.
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Illustration courtesy of Jo Richers (artist) and David Leigh (University of Manchester, Manchester, United Kingdom). In the News, dNA architecture influences genome editing efficiency. Featured Portals, articles by Topic, volume 115, Issue 38: View articles in the latest issue of pnas. Click here to view selections in the latest issue of pnas. Image courtesy of Pixabay/Ponciano.
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