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Alternative structures of adenine riboswitch and structures predicted by MutualFold and RNAstructure. (a and b) ON and OFF structures of adenine riboswitch, respectively. (c and d) Two alternative structures of adenine riboswitch predicted by MutualFold. (e) The minimum free energy (MFE) folding result of adenine riboswitch by RNAstructure. (f) The MFE folding result of adenine riboswitch with artificially generated reactivities by RNAstructure.
