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. 2014 Aug 24;14:218. doi: 10.1186/s12866-014-0218-2

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Copyright © 2014 Moon et al.; licensee BioMed Central Ltd

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Protein-protein interaction network of differentially expressed functional genes. The network was constructed based on the STRING database. Nodes (symbolized as circles and square) and edges (linking lines) represent DEGs and interactions among DEGs, respectively. Up-regulated genes were represented as a circular shape and down-regulated genes were presented as a square shape. Node color represents the functional annotation of each gene. By applying MCODE clustering algorithm, 5 clusters with the score greater than 3 were obtained.