Katherine Sanford

Katherine Koontz Sanford (July 19, 1915 – September 12, 2005), also known as Katherine Sanford Mifflin, was an American biologist and cancer researcher who worked at the National Cancer Institute for nearly 50 years, serving as head of Laboratory of Cellular and Molecular Biology. In the 1940s she became the first person to successfully clone a mammalian cell ''in vitro'', which allowed for more efficient means of creating pure strains of cells for study. She also developed the first laboratory test to distinguish people with Alzheimer's Disease and people predisposed to cancer. Provided by Wikipedia