One half of the Nobel Prize in Chemistry 2002 was awarded to Professor Kurt Wüthrich, "for his development of nuclear magnetic resonance spectroscopy for determining the three-dimensional structure of biological macromolecules in solution".
More information on the laureates can be found on homepage of the "Nobel e-Museum" at http://www.nobel.se/chemistry/laureates/2002/index.html.The research methods developed by Kurt Wüthrich at ETH, Zürich, Switzerland, founded the base for using NMR on proteins and larger biomolecules.
Earlier Nobel Prizes for nuclear magnetic resonance:
1991 Richard R. Ernst
1952 Felix Bloch and Edward Mills Purcell