Enter sequence name:    

Enter the sequence to be folded in the box below. All non-alphabet characters will be removed.
FASTA format may be used.

Enter constraint information in the box at the right. (optional) You may:

1. force bases i,i+1,...,i+k-1 to be double stranded by entering:
   F   i   0   k on 1 line in the constraint box.
2. force consecutive base pairs i.j,i+1.j-1, ...,i+k-1.j-k+1 by entering:
   F   i   j   k on 1 line in the constraint box.
3. force bases i,i+1,...,i+k-1 to be single stranded by entering:
   P   i   0   k on 1 line in the constraint box.
4. prohibit the consecutive base pairs i.j,i+1.j-1, ...,i+k-1.j-k+1 by entering:
   P   i   j   k on 1 line in the constraint box.
5. prohibit bases i to j from pairing with bases k to l by entering:
   P   i-j   k-l on 1 line in the constraint box.

• The RNA sequence is linear circular
• Folding temperature (between 0 and 100 °C)  
• Ionic conditions: 1M NaCl, no divalent ions.
• Enter the percent suboptimality number.
• Enter an upper bound on the number of computed foldings.
• Enter the window parameter if you wish.
• Enter the maximum interior/bulge loop size
• Enter the maximum asymmetry of an interior/bulge loop
• Enter the maximum distance between paired bases if you wish.

Your job can be processed while you wait (the default) or can be submitted for batch processing by pressing the button below. In this case, you will be notified at a later time that the job is finished. If you select a batch job, please make sure your E-mail address is correct in the window below.

• Select: An immediate A batch job for:
• Choose image width for png & jpg files: Small: Regular: Medium: Large: XLarge: Huge:
• Choose structure format: Automatic: Bases: Outline:
• Grid lines in energy dot plot: On: Off:
• Choose structure draw mode: default Natural angles Untangle with loop fix Simple untangle
• Choose exterior loop type: default Flat Flat_Alt
• Choose base numbering frequency: default 0 10 20 50 100 200
• Choose sequence numbering offset:
• Choose regularization angle in degrees: (Not used if 0.)
• Choose structure rotation angle:
• Choose structure annotation: None: p-num: ss-count: high-light:
  Enter high-light regions(s):