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. Author manuscript; available in PMC: 2010 Mar 1.
Published in final edited form as: Methods. 2009 Jan 14;47(3):177–186. doi: 10.1016/j.ymeth.2008.12.003

Table 1.

Base-pair composition in RNA helical structures.

A G C U B/B′
384 980 313 3975† A
128 9913† 1282 G
63 103 C
187 U
†

Totals include canonical Watson-Crick base pairs: 9500 G·C; 3069 A·U. Counts exclude 386 pairs constituted from modified bases.