The five bases found in nucleic acids define the 'alphabet' used to encode life on Earth. The construction of an organism that stably propagates an unnatural DNA base pair redefines this fundamental feature of life. See Letter p.385
CITATION STYLE
Thyer, R., & Ellefson, J. (2014). New letters for life’s alphabet. Nature, 509(7500), 291–292. https://doi.org/10.1038/nature13335
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