Figure 3.

Connections between some frequent RINs that are annotated with the number of unique occurrences. The subfigures represent three known interaction networks, the A-minor type I (A), the A-minor type I/II (C) and the ribose zipper (B). One can see that the RIN A-minor Type I/II is included within the RIN ribose zipper. In (D) is shown the A-minor type I/II with a missing long-range interaction. Please note that for the ribose zipper, a single long-range contact cannot be deduced by the algorithm since two contacts are required per interaction network (see above Interaction Networks (C)). In each subfigure the top RIN shows the minimal contact and the one at the bottom the same surrounded by canonical base pairs. The middle row shows the RIN with only one additional cWW base pair stacked on either side.