Phoebus Aaron Theodor Levene
Phoebus Aaron Theodor Levene
1869-1940
A Russian-born American chemist who is best known for his pioneering studies in the area of nucleic acids. While he worked with a variety of compounds, his most important findings were the isolation of the sugars, d-ribose from the ribonucleic acid (RNA) molecule and 2-deoxyribose from the deoxyribonucleic acid (DNA) molecule. Also noteworthy were his studies of DNA structure that helped lead to the deduction of its complete configuration by Watson and Crick.
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Aspartic Acid , aspartic acid (aspartate) (ă-spar-tik) n. see amino acid.
aspartic acid (aspartate) A non‐essential amino acid.
aspartic acid An aliphatic, acidic, p… Glutamic Acid , glutamic acid A non‐essential amino acid; it is acidic since it has two carboxylic acid groups; its amide is glutamine. See also monosodium glutamate… Threonine , threonine An essential amino acid. It was the last of the protein amino acids to be discovered, in 1935, in studies of nitrogen balance on subjects f… Carboxylic Acid , Carboxylic acids are chemical compounds that contain a carboxyl group , which is -COOH. The carboxyl group is attached to another hydrogen atom or to… Gastric Acid , acid, gastric The acid in the gastric secretion is hydrochloric acid; see also achlorhydria; gastric acidity.
gastric acid See gastric secretion. Malic acid , malic acid (2-hydroxybutanedioic acid) A crystalline solid, HOOCCH(OH)CH2COOH. L-malic acid occurs in living organisms as an intermediate metabolite…
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Phoebus Aaron Theodor Levene