Department of Biology, Syracuse University, Syracuse, New York 13244, USA. syokoyam@mailbox.syr.edu
Using comparative sequence analyses, we can identify proteins that may have been subject to positive darwinian selection. To test these statistical results, it is important to develop functional assays and identify amino-acid changes that are responsible for the adaptation of organisms to specific environments. One of the two duplicated pancreatic ribonuclease genes of a leaf-eating colobine monkey, douc langur, is now shown to have adapted to digest bacterial RNAs in the monkey's foregut.
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