George+Beadle+and+Edward+Tatum


 * George Beadle and Edward Tatum**


 * = Name ||= Nationality ||= Date of Birth ||= Education ||= Occupation ||= DNA Discovery ||= Date of Death ||
 * George Beadle || American || October 22, 1903 || B.Sc. degree and a M.Sc. degree at the University of Nebraska. He later got his Ph.D. in 1931. || Scientist || the study of the development of eye pigment in //Drosophila// which later led to the work on the biochemistry of the genetics of the fungus //Neurospora.// He got the Nobel Prize for Physiology or Medicine. || June 9, 1989 ||
 * Edward Tatum || American || December 14, 1909 || He recieved his PhD (1934) in Biochemistry from the university of Wisconsin-Madison after attending the University of Chicago. || Scientist || Working with Beadle, they showed that mutations cause changes in specific enzymes involved in metabolic pathways. They also showed a direct link between genes and enzymatic reactions. || November 5, 1975 ||

George Beadle

This is a picture showing how the experiment was done.

The discovery that Beadle and Tatum made was that individual gene mutations were responsible for individual steps in the metabolism and synthesis of vital nutrients. This discovery came by exposing //Neurospspora crassa//, a bread mold, to x-rays causeing mutations. They showed that the mutations made changes in specific enzymes that were involved with metabolic pathways. This experiment led them to make their "one gene, one enzyme theory." This theory said that a gene specifies a single enzyme, rather than a complex set of characteristics as was previously thought. Their methods completely changed the manufacture of penicillin and brought light onto many biochemical processes. They won the Nobel Prize in Medicine or Phisiology in 1958.

"Edward Tatum," http://en.wikipedia.org/wiki/Edward_Lawrie_Tatum, 9 April 2008. "George Beadle," http://en.wikipedia.org/wiki/George_Wells_Beadle, 9 April 2008. "George Beadle," http://nobelprize.org/nobel_prizes/medicine/laureates/1958/beadle-bio.htmlc, 10 April 2008. "George Wells Beadle," http://www.britannica.com/EBchecked/topic/57146/George-Wells-Beadle, 10 April 2008. "Protein Synthesis," [|**www.emc.maricopa.edu/.../ BioBookPROTSYn.html**], 10 April 2008
 * __Bibliography__**