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Published in:
2006 | OriginalPaper | Chapter
Counting Time in Computing with Cells
Authors : Oscar H. Ibarra, Andrei Păun
Published in: DNA Computing
Publisher: Springer Berlin Heidelberg
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We consider models of P systems using time either as the output of a computation or as a means of synchronizing the hugely complex processes that take place in a cell. In the first part of the paper, we introduce and study the properties of “timed symport/antiport systems”. In the second part we introduce several new features for P systems: the association/deassociation of molecules (modeling for example the protein-protein interactions), ion channel rules and gene activation rules. We show that such timed systems are universal. We also prove several properties concerning these systems.