In this combination of photos made Wednesday, Oct. 10, 2012, Duke University professor Robert Lefkowitz, left, is seen at his office in Durham, N.C., and Stanford University professor Brian Kobilka is... more 
In this combination of photos made Wednesday, Oct. 10, 2012, Duke University professor Robert Lefkowitz, left, is seen at his office in Durham, N.C., and Stanford University professor Brian Kobilka is seen at his home in Palo Alto, Calif., after they were named winners of the 2012 Nobel Prize in Chemistry. The two American researchers won the Nobel Prize in chemistry Wednesday for studies of protein receptors that let body cells sense and respond to outside signals like danger or the flavor of food. Such studies are key for developing better drugs. (AP Photo/Ted Richardson, left; Stanford University, Linda A. Cicero, right) less 
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Associated Press | Photo By Ted Richardson, left; Stanford University, Linda A. Cicero, right
Wed, Oct 10, 2012 12:12 PM EDT