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First Life with 'alien' Dna


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Alphabet of life

The addition of new letters to the 'alphabet of life' could enable biologists to vastly expand the range of proteins that they could synthesize.

Credit: Synthorx

For billions of years, the history of life has been written with just four letters—A, T, C and G, the labels given to the DNA subunits contained in all organisms.

From Nature
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