Molecular Tooth Decay
نویسنده
چکیده
Charles Darwin was intrigued with vestigial organs and, in fact, made them a part of his ‘‘long argument’’ for the existence of evolution in the natural world in Chapter 13 of On the Origin of Species. Now on the 150 anniversary of the publication of that seminal work, a study linking vestigial organs with molecular biology with paleontology has shown even more clearly how vestigial organs are of critical explanatory power in evolutionary theory. In the current issue of PLoS Genetics, Meredith et al. [1] present a comprehensive study of the Enamelin (ENAM) gene in placental mammals that sheds light on the evolutionary process. What is different about this study from others in the literature using gene sequences in the study of evolution is that ENAM sequences and functionality directly mirror the evolution of teeth in living and extinct placental mammals.
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