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Tiny Pond Microbe Found at Oxford Rewrites a Universal Rule of the Genetic Code

Researchers at Oxford have stumbled upon a single-celled organism in a campus pond whose DNA breaks one of biology's deepest rules. In Oligohymenophorea sp. PL0344, the codons TAA and TAG no longer act as stop signals — they encode amino acids — while only TGA still ends a protein, suggesting genetic translation is far more flexible than textbooks claim.