Analysis shows self-organizing maps extract meaningful patterns in KEGG pathways, highlighting metabolic reactions.
The Self-organizing map (SOM) is a popular (again) and intuitive non-linear mapping method: it transforms a multidimensional space into two dimensions (normally: they are so easy to visualize). Latino and Aires-de-Sousa published a paper that uses this method to analyze the whole KEGG pathway database: Genome-Scale Classification of Metabolic Reactions: A Chemoinformatics Approach (DOI: anie.200503833).
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Egon Willighagen (2006) studied this question.
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