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Element-contact graph representations for three typical RNA secondary structures. Three typical RNA secondary structures and their element-contact graph representations are illustrated. (A) Secondary structures of three typical RNAs (miRNA lin-4, SAM riboswitch, tRNA). (B) Stem-loop-contact graphs of the three typical RNAs. (C) Stem-contact graphs of the three typical RNAs. (D) Loop-contact graphs of the three typical RNAs.
