Welcome to the TurboFold Web Server

The TurboFold server takes three or more RNA sequences and folds them into their common lowest free energy conformations, as well as calculates base pairing probabilities. Note that sequences must be entered as a group in this server. Sequences can be entered either as a FASTA file with multiple sequences, or manually in the sequence box.

If you plan to leave this page while waiting for calculations to complete, please make sure you have entered a valid email address below. Leaving this page without entering a valid email address will render results inaccessible.

If you need specific help using the TurboFold server, please click here.

Select Sequences Input:

- OR -
Enter your sequence content below (replaces upload if present).
Sequence content should be entered in FASTA format, with a proper FASTA header on a line preceding each sequence.
Please enter headers and nucleotides only, no comments in content.
Valid nucleotides are A, C, G, T, U, and X (unknown nucleotide). Lower case nucleotides are forced single stranded in calculation.




Select Folding Mode:




Select TurboFold Options:

If a default value is left blank, the value is treated as if it was not changed at all.

General Options



Maximum Expected Accuracy Mode Options



Pseudoknots Mode Options


Threshold Mode Options




Designate Address to Email Results: