But those experiments use natural DNA to code for unnatural amino acids. (sciencemag.org)
Zheng Y, Lewis TL Jr, Igo P, Polleux F, Chatterjee A. (2016) Virus - Enabled Optimization and Delivery of the Genetic Machinery for Efficient Unnatural Amino Acid Mutagenesis in Mammalian Cells and Tissues. (polleuxlab.com)
For example, the researchers used the catalysts to transform a single proline - containing peptide chain into eight different peptides containing unnatural amino acids. (sciencedaily.com)