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Four New DNA Letters Double Life's Alphabet

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DNA molecule

An X-ray diffraction image of part of a molecule of DNA. The new, 8-letter version, is similarly stable.

Credit: Science Source/Science Photo Library

The DNA of life on Earth naturally stores its information in just four key chemicals—guanine, cytosine, adenine and thymine, commonly referred to as G, C, A and T, respectively.

From Nature
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