Images of researchers Robert Lefkowitz and Brian Kobilka (R) of the U.S., who won the 2012 Nobel Prize in Chemistry, are seen on a projector during a news conference by the Royal Swedish Academy of Sciences in Stockholm, October 10, 2012. Two American scientists Lefkowitz and Kobilka have won the 2012 Nobel Prize for chemistry for groundbreaking work on a key family of receptors which enable cells to sense their environment, the prize committee said on Wednesday. REUTERS/Bertil Enevag Ericson/Scanpix (SWEDEN – Tags: HEALTH SCIENCE TECHNOLOGY) THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. SWEDEN OUT. NO COMMERCIAL OR EDITORIAL SALES IN SWEDEN. NO COMMERCIAL SALES
