Journal
BIOTECHNIQUES
Volume 38, Issue 2, Pages 277-283Publisher
FUTURE SCI LTD
DOI: 10.2144/05382RR04
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Existing analysis tools to study the collective properties of gene functional modules cannot return highly homogeneous modules and do not provide quantitative measures of module activity level. By partitioning genes according to multiple gene functional categorization principles and summarizing gene expression values into module expression values, MEGO (module expression based on gene ontology), a standalone microarray data analysis program, is able to extract highly activated gene functional modules that are of much interest to microarray experimenters. With multiple functional categorization principles simultaneously introduced in MEGO, the partition of genes is more delicate, and the collective property of a group of genes is sharpened and easier to capture. The quantitative measures of module;activity levels returned by MEGO give users a quick impression of the direction and degree of module regulation. MEGO efficiently'determines the answers to frequently asked questions, much as' which functional classes have been induced or repressed under a specific experiment and to which levels these fivictional classes have been affected. MEGO is available free of charge for academic use and may be dolwnloaded from http://www.dxy.cn/mego/MEGOInstall.EXE. Supplementary information can be found on the authors' web page at http://www.dxy.cn/mego/ and at the BioTechniques' web site at http://www. BioTechniques.com/February2005/TuSupplementary.html.
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