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Catalytic reaction dynamics in inhomogeneous networks

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Title: Catalytic reaction dynamics in inhomogeneous networks
Authors: Watanabe, Akitomo Browse this author
Yakubo, Kousuke Browse this author →KAKEN DB
Issue Date: 12-May-2014
Publisher: American Physical Society
Journal Title: Physical Review E
Volume: 89
Issue: 5
Start Page: 052806-1
End Page: 052806-7
Publisher DOI: 10.1103/PhysRevE.89.052806
PMID: 25353843
Abstract: Biochemical reactions in a cell can be modeled by a catalytic reaction network (CRN). It has been reported that catalytic chain reactions occur intermittently in the CRN with a homogeneous random-graph topology and its avalanche-size distribution obeys a power law with the exponent 4/3 [A. Awazu and K. Kaneko, Phys. Rev. E 80, 010902(R) (2009)]. This fact indicates that the catalytic reaction dynamics in homogeneous CRNs exhibits self-organized criticality (SOC). Structures of actual CRNs are, however, known to be highly inhomogeneous. We study the influence of various types of inhomogeneities found in real-world metabolic networks on the universality class of SOC. Our numerical results clarify that SOC keeps its universality class even for networks possessing structural inhomogeneities such as the scale-free property, community structures, and degree correlations. In contrast, if the CRN has inhomogeneous catalytic functionality, the universality class of SOC depends on how widely distributed the number of reaction paths catalyzed by a single chemical species is.
Rights: ©2014 American Physical Society
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 矢久保 考介

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