RNA FRABASE 2.0: an advanced web-accessible database with the capacity to search the three-dimensional fragments within RNA structures

Table 1 RNA FRABASE 2.0 database statistical information by experimental method.

Experimental method	structures	models	strands	residues	residues without coordinates (%)
X-ray	1099	1110	2571	680562	20620 (3.03%)
NMR	424	5013	6259	135001	417 (0.31%)
Electron microscopy	41	41	138	51108	763 (1.49%)
Other	1	1	1	49	0
All methods	1565	6165	8969	866720	21800 (2.52%)

ISSN: 1471-2105