TNA: It's Not What You Think | GenomeWeb

Was there anything before DNA and RNA? There might have been TNA, says New Scientist's Michael Marshall. Researchers have recently found that TNA, for threose nucleic acid, can perform one of RNA's key functions, Marshall says — storing genetic information and acting as an enzyme. While TNA is no longer found in nature, it may have been around to help the first forms of life on Earth to develop.

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