Arnold Levine is a medical researcher. His research centers on the causes of cancer. In 1979, Levine and others discovered the p53 tumor suppressor protein, a molecule that inhibits tumor development. As chair of the National Institutes of Health Commission on AIDS Research and the National Academies Cancer Policy Board, he has helped determine national research priorities. He established the Institute’s Center for Systems Biology, which concentrates on research at the interface of molecular biology and the physical sciences.
Source - http://www.bcrfcure.org/rese_meet_levine.html