Word: nucleic
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Degraded Virus. The two researchers worked with the simple and well-known virus that causes mosaic disease in tobacco plants and is called TMV for short. Its particles are rod-shaped, and are known to consist of central cores of nucleic acid with protein molecules strung around them. Drs. Fraenkel-Conrat and Williams prepared pure solutions of the submicroscopic rods, mixed them with dilute alkaline chemicals and held them close to the freezing point for two to three days. This treatment "degraded" some of the virus, separating the rods into nucleic acid and protein molecules. Undegraded rods were taken...
...which he had practically no training. After more than ten years of impatient plodding, shaggy-thatched Phoebus Levene made a name for himself, and by 1907 he was an outstanding member of the Institute. One of his most famous contributions is his detailed picture of the chemical structure of nucleic acids. Nuclei acids are constituents of cell nuclei and their chromosomes, tiny inheritance carriers which exist in the dividing cells of plants and animals. He is also world renowned for his work in vitamins, hormones, amino-acids...