This Week in PNAS

In the early, online edition of the Proceedings of the National Academy of Science, Indiana University biologist Michael Lynch and his colleagues peek at the base substitution mutation rate in Paramecium tetraurelia, a freshwater ciliate. From genome sequence data from seven so-called "mutation accumulation" lines, which had been started with individual cells and grown for thousands of generations, the team saw pronounced genome stability in P. tetraurelia.

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