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DNA Has Four Bases. Some Viruses Swap in a Fifth.

The Quanta Podcast

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The Plimerace Plimerase Is a Plimerase, and Its Evolution Could Provide New Insights

Z and other modified d and a bases seem to have evolved to help viruss evade the defenses with which bacteria degrade foreign genetic material. Timed romsburg says, the system evolved to allow a re programming. Stephen benner is a chemist at the foundation for applied molecular ev lution in florida. Says standard genom sequencing methods for looking for biological diversity in nature would fail to find these.

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