Profiles in Science http://profiles.nlm.nih.gov/CD/ now features the papers of American biochemist Paul Berg (b. 1926), who has been making outstanding contributions to biochemistry and molecular biology for over fifty years. As a young researcher he resolved several key problems in metabolic chemistry, and went on to discover the mechanisms by which DNA and RNA direct the synthesis of proteins in living systems. In 1972, he and his colleagues at Stanford University synthesized the first recombinant DNA (rDNA), and he subsequently led the international community of rDNA researchers in their efforts to address the potential physical and ethical hazards posed by that revolutionary technology. He received the 1980 Nobel Prize in Chemistry for his protein synthesis and rDNA work, and has continued to elucidate genetic mechanisms, using specially designed recombinant organisms. This online collection contains correspondence, lab notebooks, administrative files, grant files, departmental records, student files, lectures, reprints, illustrations, videotapes, and audiotapes from the Stanford University Libraries Department of Special Collections and University Archives, which is the repository for the Paul Berg Papers.