Antarctic fish have antifreeze in their veins

September 23, 2014 3:37 PM

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"We discovered what appears to be an undesirable consequence of the evolution of antifreeze proteins in Antarctic notothenioid fishes," said Paul Cziko.

For the benefit of avoiding frozen blood, Antarctic notothenioid fish species must tolerate ice in their veins. That's right, the same antifreeze proteins that latch onto ice crystals and prevent them from growing also inhibit them from melting.

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