More than 2 billion years ago, oxygen levels on Earth surged. New studies of ancient, simple cells hint at how proteins usually linked to gene expression might have helped fuel the evolution of complex cells in response. https://www.quantamagazine.org/dnas-histone-spools-hint-at-how-complex-cells-evolved-site_title-20210510 https://twitter.com/QuantaMagazine/status/1430944641004843017/photo/1
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