
Antifreeze proteins prevent fish from freezing
How do fish survive in Antarctic waters without freezing? The answer is that
their blood plasma has lots of ‘antifreeze’ protein that bind to ice and prevent
the crystals from growing and thus causing damage. Some evolutionists claim that
this is an example of ‘evolution in action’ because new DNA code has been
created that codes for the antifreeze protein. But does this really support
molecules-to-man evolution? Antifreeze proteins are quite different from the
complex, specific proteins found elsewhere in the fish, or in our own bodies.
They are simple proteins, which may have arisen through the duplication of a
digestive enzyme gene that lost its original function due to mutations
scrambling it. Even though they fortuitously prevent ice crystals from growing,
this is a very non-specific job that many different random proteins could
perform. So, even though antifreeze proteins help fish survive, they don’t
explain how complex, specific proteins could arise by mutations.
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05 Aug, 201501:01