Sunday, April 09, 2006

Hagfish and lamprey

Page A19, New York Times, Friday, April 7. A reconstruction of ancient genes from extinct animals has demonstrated, it is said, how nature modifies and reuses existing genes to create new cell mechanisms via evolution. The focus of U of Ore biology professor Joseph Thornton was on two hormone receptors associated with, respectively, stress response and kidney function in higher animals. Equivalent antecedents were found in jawless primitive lampreys and hagfish.

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