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. 2004 Aug 6;5:10. doi: 10.1186/1471-2199-5-10

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Copyright © 2004 Meyer and Miklós; licensee BioMed Central Ltd.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Definition of the statistics. Pictorial definitions of the four configurations 3'cis, 3'trans, 5'cis and 5'trans which correspond to the four statistics used to measure the directedness of RNA folding. Sequence positions i and form a base-pair within the known secondary structure. Sequence position c is an alternative base-pairing partner for i (but according to the base-pairing rules therefore not for ) within a competing, alternative helix of a minimum length min_stem. See the text for more explanation.

Inline graphic — Definition of the statistics. Pictorial definitions of the four configurations 3'cis, 3'trans, 5'cis and 5'trans which correspond to the four statistics used to measure the directedness of RNA folding. Sequence positions i and form a base-pair within the known secondary structure. Sequence position c is an alternative base-pairing partner for i (but according to the base-pairing rules therefore not for ) within a competing, alternative helix of a minimum length min_stem. See the text for more explanation.