The Nobel Prize in Chemistry 2003
Peter Agre, Roderick MacKinnon
The Nobel Prize in Chemistry 2003 was awarded "for discoveries concerning channels in cell membranes" jointly with one half to Peter Agre "for the discovery of water channels" and with one half to Roderick MacKinnon "for structural and mechanistic studies of ion channels".
MLA style: "The Nobel Prize in Chemistry 2003". Nobelprize.org. 24 May 2013 http://www.nobelprize.org/nobel_prizes/chemistry/laureates/2003/