A biological antifreeze; antifreeze proteins found in the blood of polar fish alter the way ice crystals grow. From: Science News | Date: November 22, 1986| Author: | COPYRIGHT 1986 Science Service, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information) Copyright information

A Biological Antifreeze

The chilly waters of polar oceans harbor many fish that seem to be immune to freezing. These Arctic and Antarctic species are cold-blooded -- their body temperature matches that of their environment. Yet they swim through water laden with ice crystals or lurk in icy underwater caverns. In this ice-cold water, their body fluids and tissue should freeze, but don't.

To keep from freezing, it turns out that polar fish produce and store in their blood a set of large protein molecules that have powerful "antifreeze" properties. The addition of these ...

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