Table 2.

Biological RNA structures.

No.	Description	Size (bases)
1	Minimal catalytic domains of the hairpin ribozyme satellite RNA of the Tobacco ringspot virus	65
2	U3 snoRNA 5' domain from Chlamydomonas reinhardtii, in vivo probing	79
3	H. marismortui 5 S rRNA	122
4	VS ribozyme from Neurospora mitochondria	167
5	R180 ribozyme	178
6*	XS1 ribozyme, Bacillus subtilus P RNA based ribozyme	314
7*	Homo Sapiens RiboNuclease P RNA	342
8	S20 mRNA from E. coli	372
9	Halobacterium cutirubrum RNAse P RNA	375
10	Group II intron ribozyme D135 from Saccharomyces cerevisiae mitochondria	583

Biological structures obtained from the literature and used by Andronescu et al. [9]. The structures marked with an asterisk (*) were obtained from original, pseudoknotted structures by eliminating 8 base pairs in each case to remove the pseudoknot.