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The RNAfold web server will predict secondary structures of single stranded RNA or DNA sequences. Current limits are 7,500 nt for partition function calculations and 10,000 nt for minimum free energy only predicitions.

Simply paste or upload your sequence below and click Proceed. To get more information on the meaning of the options click the help symbols. You can test the server using this sample sequence.

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>Show constraint folding

 Fold algorithms and basic options 
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>Show advanced options

 Output options 
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