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Amending the Genetic Code: Yeast adds new amino acids to its proteins

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2:02pm, August 13, 2003

With only rare exceptions, every organism constructs proteins from just 20 building blocks called amino acids. Recently, however, researchers modified Escherichia coli bacteria so that the single-celled organisms also make an alien amino acid and incorporate it into proteins (SN: 1/25/03, p. 53: Available to subscribers at Unnatural Biochemistry: Bacteria make and use an alien amino acid).

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