Do sharks really not get cancer, and if not why?

abcd abcd at
Sat Mar 1 22:34:41 EST 1997

Jim Barron wrote:

> I have read that there is an oil in shark liver that acts to chelate
> mercury.  Would this be Squalamine?   Since sharks are so high on the
> marine food chain and mercury is known to be  a problem in things like
> tuna, etc. presumeably they must have SOME method for dealing with it.
> jdbarron at

Humans and mammals use a chelating protien called metallothionen, which
regularly transports metals in the blood but will also chelate heavy
metals.  Sharks might use something similar.

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