FT - Study of Residue Periodicities in Sequences

Pasquier, C.M., Promponas, V.I., Varvayannis, N.J. and Hamodrakas, S.J.
Department of Cell Biology and Biophysics,
Faculty of Biology, University of Athens
Panepistimiopolis, Kouponia, Athens 15701, Greece

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This computer package uses a Fast Fourier Transform (FFT) algorithm to locate residue periodicities in either protein or DNA sequences.

The search and study of residue periodicities in protein sequences is a powerful tool for the structural and functional study of proteins, whose spatial conformation has not been solved yet. Such periodicities may reveal the existence of repeating patterns and help towards an understanding of the molecular structure of a fibrous/structural protein. Also, they may reveal ways of assembly of such proteins. Periodicities in DNA may dictate structural and functional characteristics of the molecule.


  1. About the program
  2. Copyright notice
  3. Input description
  4. Output
  5. Examples
  6. Bug reports and user feedback
  7. References