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. 2015 Jun;21(6):1110–1121. doi: 10.1261/rna.047522.114

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© 2015 Kerpedjiev et al.; Published by Cold Spring Harbor Laboratory Press for the RNA Society

This article, published in RNA, is available under a Creative Commons License (Attribution 4.0 International), as described at http://creativecommons.org/licenses/by/4.0/.

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FIGURE 1. — The coarse-grain representation of the 2D structure of an RNA molecule. (A) The paired regions are shown as gray rectangles. The arcs show the path of the strand in connecting the paired regions. The labels in black are names given to distinguish the different secondary structure elements in the graph. The elements f1 and t1 are the 5′ and 3′ unpaired regions, respectively. Elements starting with “s” correspond to base-paired canonical helices. Elements starting with an “h” are hairpins. Interior loops and multiloops are denoted by names starting with “i” and “m,” respectively. The numbers in red indicate the corners of the stem. (B) The skeleton graph representation of the structure.