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Baltimore, David

(Encyclopedia)Baltimore, David bôlˈtĭmôr [key], 1938–, American microbiologist, b. New York City, Ph.D. Rockefeller Univ., 1964. He conducted (1965–68) virology research at the Salk Institute before becomin...

Tarim

(Encyclopedia)Tarim dārēmˈ [key], Mandarin Dayan, chief river of Xinjiang Uygur Autonomous Region, NW China, c.1,300 mi (2,090 km) long, formed by the union of the Aksu and the Yarkant rivers at the western end ...

Crick, Francis Harry Compton

(Encyclopedia)Crick, Francis Harry Compton, 1916–2004, English scientist, grad. University College, London, and Caius College, Cambridge. Crick was trained as a physicist, and from 1940 to 1947 he served as a sci...

Hemings, Sally

(Encyclopedia)Hemings, Sally, 1773–1835, African-American slave owned by Thomas Jefferson, b. Charles City co., Va.; her original name was probably Sarah. Her father was John Wayles, Jefferson's father-in-law; he...

Steitz, Thomas Arthur

(Encyclopedia)Steitz, Thomas Arthur, 1940–2018, American biophysicist and biochemist, b. Milwaukee, Ph.D. Harvard, 1966. Steitz was a professor at Yale from 1970 and a researcher at the Howard Hughes Medical Inst...

leucine

(Encyclopedia)CE5 leucine lo͞oˈsēn [key], organic compund, one of the 20 amino acids commonly found in animal proteins. Only the l-stereooisomer appears in mammalian protein. It is one of several essential am...

monoclonal antibody

(Encyclopedia)monoclonal antibody, an antibody that is mass produced in the laboratory from a single clone and that recognizes only one antigen. Monoclonal antibodies are typically made by fusing a normally short-l...

Ramakrishnan, Venkatraman

(Encyclopedia)Ramakrishnan, Venkatraman, 1952–, American molecular biologist, b. India, Ph.D. Ohio Univ., 1976. He was a researcher at Oak Ridge National Laboratory (1982–83) and at Brookhaven National Laborato...

thyroxine

(Encyclopedia)thyroxine thīrŏkˈsēn [key], substance secreted by the thyroid gland. The hormone thyroxine forms by combining the amino acid tyrosine with iodine. Complexed to a protein, it is stored in the folli...

cytosine

(Encyclopedia)cytosine sīˈtōsēnˌ [key], organic base of the pyrimidine family. It was isolated from the nucleic acid of calf thymus tissue in 1894. A suggested structure for cytosine, published in 1903, was co...