Chemistry Nobel Prize winner Thomas A. Steitz, a model of his experiment in his lab at Yale University in New Haven Conn., Wednesday Oct. 7, 2009. Americans Venkatraman Ramakrishnan and Steitz and Israeli Ada Yonath won the 2009 Nobel Prize in chemistry on Wednesday for atom-by-atom mapping of the protein-making factories within cells _ a feat that has spurred the development of antibiotics. (AP Photo/Douglas Healey).