Table 5. Comparison of genus of the whole secondary structure between RNA sequences in the PDB dataset (190 sequences in total) and in the RNA STRAND dataset (1939 sequences in total).

Total genus	No. of RNA sequences reportedin PDB dataset	Proportion	No. of RNA sequences reported inRNA STRAND dataset	Proportion
1	66	0.347	597	0.308
2	23	0.121	263	0.136
3	5	0.026	414	0.214
4	18	0.095	585	0.302
5	8	0.042	22	0.011
6	2	0.011	0	0
7	3	0.016	7	0.004
8	2	0.011	2	0.001
9	2	0.011	8	0.004
10	5	0.026	40	0.021
11	4	0.021	1	0.001
12	9	0.047	0	0
13	3	0.016	0	0
14	34	0.179	0	0
15	4	0.021	0	0
16	0	0	0	0
17	1	0.005	0	0
18	1	0.005	0	0