This Week in PNAS

In the early, online edition of the Proceedings of the National Academy of Sciences, a team from Italy and the US describes patterns found in the genomes of symbiotic and free-living Polynucleobacter necessarius — a bacterial species expected to offer clues about processes that can contribute to genome reduction. By sequencing the genome of symbiotic P.

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This Week in PNAS

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NIH's Francis Collins writes that scientific advances are poised to help populations all over the world, but more scientists are needed to keep the momentum.