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. 2018 Mar 9;46(9):4783–4793. doi: 10.1093/nar/gky139

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© The Author(s) 2018. Published by Oxford University Press on behalf of Nucleic Acids Research.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 1. — The 3D structures of two RNA motifs containing both tetraloops and sarcin-ricins. (A) The hairpin loop in the Homo sapiens mitochondrial 16S rRNA (PDB ID: 3J7Y, chain: A) which contains a GNAA tetraloop. The blue tube shows a superimposed GNAA tetraloop in a 23S rRNA (PDB ID: 4BW0, chain: A, 9–14). (B) The hairpin loop in the Haloarcula marismortui 23S rRNA (PDB ID: 1S72, chain: 0) which contains a UUCG tetraloop. The blue tube shows a superimposed UUCG tetraloop in a mRNA fragment (PDB ID: 2HW8, chain: B, 15–20).