BioCyc

http://biocyc.org/

A web tool for browsing pathways

Here is a snippet from the introduction page http://biocyc.org/intro.shtml:

"Scientists can use the BioCyc Web site to visualize individual metabolic pathways, or to view the complete metabolic map of an organism [example]. The latter diagram can be used to analyze gene expression, proteomics, or metabolomics data using the Omics Viewers, such as to produce animated views of time-course gene-expression experiments [example]. The BioCyc Web site also provides genome browsing capabilities [example], and for the EcoCyc DB in particular, provides extensive information about transcriptional mechanisms of gene regulation [example]. BioCyc also provides comparative analysis tools (see Tools -> Comparative Analysis in the toolbar). "