Researchers describe a general and highly efficient approach for incorporating a variety of unnatural amino acids into proteins at desired locations in mammalian cells.
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Hausmann, C., Ling, J. & Ibba, M. The unnatural culture of amino acids. Nat Methods 4, 205–206 (2007). https://doi.org/10.1038/nmeth0307-205
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DOI: https://doi.org/10.1038/nmeth0307-205