Fig. 3.

The energy range covered by each basin (Y-axis) sorted by the minimal energy within the basin (X-axis) over the whole energy range of the energy landscape of RNA d33. Relative energies are given by $E_{\text{rel}}(x)=(E(x)-E_{\min })/(E_{\max }-E_{\min })$ where $E_{\min }/E_{\max }$ denote the energy boundaries over X. The dotted lines mark the position of the unstructured state with energy 0