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Caption: Jay F. Storz, University of Nebraska. This image relates to a paper that appeared in the June 14, 2013, issue of Science, published by AAAS. The paper, by Chandrasekhar Natarajan at University of Nebraska in Lincoln, NE, and colleagues was titled, "Epistasis Among Adaptive Mutations in Deer Mouse Hemoglobin."
Credit: [Image courtesy of Brent Hampton]
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