theatlantic.com
To
survive in the frigid ocean waters around the Arctic and Antarctica,
marine life evolved many defenses against the lethal cold. One common
adaptation is the ability to make antifreezing proteins (AFPs) that
prevent ice crystals from growing in blood, tissues, and cells.
Graham thinks that these sequences are “definitive proof” that a small chunk of a herring chromosome made its way into a smelt’s. “If anybody wants to dispute this,” she said, “you know, I don’t see how they possibly could.”
Cédric Feschotte, a genome biologist at Cornell University who was not involved in the study, agrees. “It seems unmistakable when you look at the data,” he said. What really intrigues him, though, is how well this finding lines up with work that he and others are doing on transposable elements and the rise of new genes.
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