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AKB: Biologische Physik

AKB 200: Poster Session II

AKB 200.57: Poster

Dienstag, 8. März 2005, 17:00–19:00, Poster TU C

Analysis of spatio-temporal patterns of the energy metabolism in a yeast extract by Karhunen - Loève decomposition — •Satenik Bagyan, Ronny Straube, Thomas Mair, and Stefan Müller — Otto-von-Guericke-Universität Magdeburg, Institut für Experimentelle Physik, Abteilung Biophysik, Universitätsplatz 2, 39106 Magdeburg, Germany

Glycolytic degradation of sugar is the primary pathway for the generation of energy in living cells and shows non-linear, oscillatory reaction kinetics, which is mediated by an autocatalytic reaction. Coupling of non-linear reaction kinetics with diffusion leads to the formation of glycolytic waves. We used an open spatial reactor to investigate the spatio-temporal pattern formation during glycolysis in the yeast extract. The dynamics of glycolytic waves in the open spatial reactor is changing over time from ordered (circular- or spiral- shaped waves) to more complex structures. To elucidate the mechanisms leading from ordered to complex behaviour, we analysed the dynamics of the spatio-temporal patterns with a Karhunen-Loève decomposition. We found that the early behavior of the patterns can be reconstructed with only 2 modes, but the later states require more modes for reconstruction. This indicates that during the initial states the patterns are dominated by periodic forces whereas at later states some kind of spatial desynchronization takes place.