MetaPathwayHunter (MPH) is a pathway alignment tool that, given a query pathway and a collection of pathways, finds and reports all approximate occurrences of the query in the collection, ranked by similarity and statistical significance.
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R. Y. Pinter, O. Rokhlenko, E. Yeger-Lotem, M. Ziv-Ukelson
“Alignment of Metabolic Pathways”
Bioinformatics, Vol. 21, No. 16 (August 2005), pp. 3401-3408.