* [http://www2.ufp.pt/~pedros/bq/integration.htm Interactive Flow Chart of the Major Metabolic Pathways]
* [http://www.biochemweb.org/metabolism.shtml Metabolism, Cellular Respiration and Photosynthesis - The Virtual Library of Biochemistry and Cell Biology]
* [http://www.rpi.edu/dept/bcbp/molbiochem/MBWeb/mb1/MB1index.html The Biochemistry of Metabolism at Rensselaer Polytechnic Institute]
* [http://www.expasy.org/cgi-bin/show_thumbnails.pl Flow Chart of Metabolic Pathways at ExPASy]
