1. Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moskow Region, 142292, Russia
2. Department of Mathematics, University of Utah, Salt Lake City, UT 84112, USA.
3. Max-Planck-lnstitute für Ernährungsphysiologie, Rheinlanddamm 201, 4600 Dortmund, Germany
4. Bioinformatica, University of Utrecht, Padualaan 8, 3584 CH Utrecht, Netherlands