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As one of its goals, synthetic biology seeks to increase the number of building blocks in nucleic acids. While efforts towards this goal are well advanced for DNA, they have hardly begun for RNA. Herein, we present a crystal structure for an RNA riboswitch where a stem C:G pair has been replaced by a pair between two components of an artificially expanded genetic‐information system (AEGIS), Z and...
Mit zusätzlichen Nucleotid‐„Buchstaben“ ausgestattete Nucleinsäuren lassen sich in funktioneller Weise in RNA einbauen. In der Zuschrift auf S. 9991 ff. präsentieren die Gruppen um Piccirilli und Benner die erste Molekülstruktur (durch die „Fotos“ im Bild symbolisiert) eines funktionalen RNA‐Moleküls auf Basis eines Sechs‐Nucleotid‐Alphabets (G, A, U, C sowie die künstlichen Nucleotide Z und P).
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