There are more than 4 bases....
Just some aren't so common, thing slike Xanthine
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Sun 3 Jun 2007, 14:16,
archived)
*learns*
im afraid im a physicist rather than having gone down the bio route, so i dont know much of this
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Sun 3 Jun 2007, 14:17,
archived)
There's also RNA
But that generally has the half life of a herd of hedgehogs on an autobahn.
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Sun 3 Jun 2007, 14:19,
archived)