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. 2016 Jan 25;7(4):428–437. doi: 10.1002/wrna.1330

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© 2016 The Authors. WIREs RNA published by Wiley Periodicals, Inc.

This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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Ball‐and‐stick model of pRNA where balls are loops and sticks are helices. CE and D loops (orange) mediate self‐assembly of pRNA into nanorings (as found on the prohead) and potentially linear and/or branched structures in vitro.