References Goodsell, David S. (1998). The Machinery of Life. New York: Springer-Verlag. Goodsell, David S (2002, February). Molecular Machinery: A Tour of the Protein Data Bank. Retrieved September 10, 2008, from Protein Data Bank Web site: http://www.rcsb.org/pdb/static.do?p=general_information/news_publications/newsletters/2004q1/poster_available.html