Why don’t Antarctic ice fish freeze?

I investigate the cold-defying chemistry of antifreeze glycoproteins for Chemistry World’s Chemistry in its element¬†podcast.

When scientists first dicsovered fish living in the icy waters around the south pole, it posed a tantilizing puzzle: why don’t these cold-blooded fish freeze like the water around them?

The search was on for some sort of anti-freeze and it took a while to find. Similar complex molecules have evolved all through the animal and plant kingdoms among various organisms that survive extreme conditions.

I find out how people too are beginning to learn how to benefit from this useful piece of chemistry.

Photo by Icefishuk. Licensed under Creative Commons Attribution-Share Alike 3.0 via Wikimedia Commons.

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