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484 Scientists discover microbe that breaks a fundamental rule of the genetic code

ScienceDaily
ScienceDaily · 02/28/2026 01:47 EDT

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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