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Scientists discover microbe that breaks a fundamental rule of the genetic code
General • February 27, 2026
Scientists at UC
Berkeley have
discovered a
microbe that bends one of biology’s most
sacred rules. Instead of treating a specific three-letter DNA code as a clear “stop” signal, this methane-producing archaeon sometimes reads it as a green light—adding an unusual amino acid and continuing to build the protein. The result is a kind of genetic coin flip: two different proteins can emerge from the same code, influenced partly by environmental conditions.
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