Regensburg 2004 – wissenschaftliches Programm

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AKB: Biologische Physik

AKB 41: Cell Signaling

AKB 41.2: Hauptvortrag

Donnerstag, 11. März 2004, 17:30–18:00, H40

Intracellular Ca²⁺ Dynamics — •Martin Falcke — Hahn Meitner Institut, SF5, Glienicker Str. 100, 14109 Berlin

Ca²⁺ is an important messenger in living cells. Intracellular Ca²⁺ dynamics is a pattern forming system showing a rich variety of phenomena. The transition from a regime dominated by random local events to global events like waves and oscillations can be observed. Fluorescent dyes allow for observation of elemental events underlying global patterns at the same time as the global pattern itself. That opens the unique possibility to study the built up of global events from elemental random local events. The transition from a fluctuation dominated regime to a more deterministic behavior is accompanied by a transition from behavior determined by spatial discreteness to a continuous medium. As a continuous medium, intracellular Ca²⁺ dynamics shows novel phenomena like e.g. a gap of forbidden velocities in the dispersion relation. The talk gives an introduction to Ca²⁺ dynamics and its theoretical desription.