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. Author manuscript; available in PMC: 2020 Jun 1.
Published in final edited form as: Methods. 2019 Mar 27;162-163:74–84. doi: 10.1016/j.ymeth.2019.03.022

Figure 2:

Figure 2:

Types of RNA helices that correspond to di erent types of vertices in dual graphs. Incoming strands are indicated by red arrows and outgoing strands by brown arrows. (a) RNA helix with 2 incoming and 2 outgoing strands corresponds to a degree-4 vertex in the dual graph. (b) RNA helix containing both the 5′ and 3′ ends with 1 incoming and 1 outgoing strands corresponds to a degree-2 vertex in the dual graph. (c) RNA helix containing the 5′ end with 1 incoming and 2 outgoing strands corresponds to a degree-3 vertex in the dual graph. (d) RNA helix containing the 3′ end with 2 incoming and 1 outgoing strands corresponds to a degree-3 vertex in the dual graph.