Gertrude B. Elion was an American biochemist and pharmacologist. She developed a multitude of drugs using innovative research methods that would later lead to the development of the AIDS drug AZT. She also developed the first immunosuppressive drug, azathioprine, used for organ transplants. She worked largely with purines developing the first treatment for leukemia, and treatments for gout, malaria, cancer and meningitis. She won the Nobel Prize in 1988 for her extraordinary work.