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First Life with 'alien' Dna


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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