Additional file 9.
Figure S4: The wobble ratios of the structures without ligands (A) and with the same ligands (B). Of the 137 structural groups, 30 contained some structures without ligands, and 111 contained some structural pairs with the same ligands. Then their wobble ratios were counted.
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Zhang and Su BMC Bioinformatics 2012 13(Suppl 15):S12 doi:10.1186/1471-2105-13-S15-S12