Albrecht Kossel

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Albrecht Kossel (16 September 1853 to 5 July 1927) after graduating in medicine made his name in biochemistry, being awarded the 1910 Nobel prize "for research in cell biology, especially proteins and nucleic acids". He built on the work of his mentor Ernst Hoppe-Seyler and Johannes Miescher by isolating isolating adenine, cytosine, guanine, thymine, and uracil. He also discovered histidine, isolated theophylline and contributed to the understanding that proteins were polypeptides.