Making Copies in the RNA World

@article{Davenport2001MakingCI,
  title={Making Copies in the RNA World},
  author={R. Davenport},
  journal={Science},
  year={2001},
  volume={292},
  pages={1278 - 1278}
}
By mimicking evolution in the lab, scientists have produced the first RNA enzyme that can make copies of other RNA molecules. The discovery, reported on page 1319, provides a missing piece of evidence for a primitive biological world that existed before DNA and proteins entered the scene. 
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