Research Into The Chemical Composition of Protein
In 1895, Kossel was professor of physiology as well as director of the Physiological Institute at the University of Marburg. Around this time, he began investigations into the chemical composition of proteins, the alterations in proteins during transformation into peptone, the peptide components of cells, and other investigations.
In 1896, Kossel discovered histidine, then worked out the classical method for the quantitative separation of the "hexone bases" (the alpha-amino acids arginine, histidine, and lysine). He was also the first to isolate Theophylline, a therapeutic drug found naturally in tea and cocoa beans.
In 1901, Kossel was named to a similar post at Heidelberg University, and became director of the Heidelberg Institute for Protein Investigation. His research predicted the discovery of the polypeptide nature of the protein molecule.
Read more about this topic: Albrecht Kossel
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