Where can I find detailed schemactics of primary metabolic pathways in yeast, ecoli and others?

[EdwardPerello]

Im designing a novel metabolic pathway and want to identify a good pre-existing pathway to augment. Any pointers?

[poli]

http://www.biocyc.org/ Around 2000 genomes have been annotated with the pathway tools software. Model organisms have highly curated databases http://ecocyc.org/  http://pathway.yeastgenome.org/ 

[poli]

There is also kegg http://www.genome.jp/kegg/kegg2.html