Figure 3.

Structural element features of conserved and non-conserved pre-miRNAs with different level of stability. (A) diagram of structural elements of a hairpin secondary structure. (B-F) Boxplot (box with notch) of length ratios of interior stem (B), interior loop (C), terminal loop (D), first stem (E), and overhang (F) with respect to pre-miRNAs within S_c^m (black), S_n^u (red), S_n^m (red), and S_n^s (red). (F-J) Boxplot (box without notch) of region U ratios of interior stem (G), interior loop (H), terminal loop (I), and first stem (J) of pre-miRNAs within S_c^m, S_n^u, S_n^m, and S_n^s.