Current protocols in bioinformatics / editoral board, Andreas D. Baxevanis ... [et al.], Vol. Chapter 8 (June 2012), doi:10.1002/0471250953.bi0807s38 There is considerable interest in the bioinformatics community in creating pathway databases. The Reactome project (a collaboration between the Ontario Institute for Cancer Research, Cold Spring Harbor Laboratory, New York University Medical Center, and the European Bioinformatics Institute) is one such pathway database and collects structured information on all the biological pathways and processes in the human. It is an expert-authored and peer-reviewed, curated collection of well-documented molecular reactions that span the gamut from simple intermediate metabolism to signaling pathways and complex cellular events. This information is supplemented with likely orthologous molecular reactions in mouse, rat, zebrafish, worm, and other model organisms. This unit describes how to use the Reactome database to learn the steps of a biological... - Simon Cockell