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unafold website  

UNAFold is a comprehensive software package for nucleic acid folding and hybridization prediction. The name is derived from "Unified Nucleic Acid Folding". Folding of single-stranded RNA or DNA, or hybridization between two single-strands, is accomplished in a variety of ways. Partition functions can be computed to derive base pair probabilities and stochastic samples of foldings or hybridizations. Energy minimization methods compute minimum free energy foldings or hybridizations, and can also compute suboptimal foldings that mimic the performance of the famous mfold software.

For melting simulations, the package computes not just melting temperatures, but entire melting profiles. UV absorbance at 260 nm, heat capacity change (Cp), and mole fractions of different molecular species are computed as a function of temperature. ITC (Isothermal Titration Calorimetry) and van't Hoff plots are also simulated.

Required Modules


  • unafold

System Variables

  • HPC_UNAFOLD_DIR - installation directory


  • Validated 4/5/2018