Hans Adolf Krebs (1900-1981) (We know this is not directly DNA related, but it is just too good to pass up this offer.) With the purchase of this picture/signature we will ALSO send you a Citric Acid Cycle mug (Krebs cycle) - free.

Sir Hans Adolf Krebs was born at Hildesheim, Germany, on August 25th, 1900. He is the son of Georg Krebs, M.D., an ear, nose, and throat surgeon of that city, and his wife Alma, néeDavidson.

In 1937 Krebs demonstrated the existence of a cycle of chemical reactions that combines the end-product of sugar breakdown, later shown to be an “activated” form of the two-carbon acetic acid, with the four-carbon oxaloacetic acid to form citric acid. The cycle regenerates oxaloacetic acid through a series of intermediate compounds while liberating carbon dioxide and electrons that are immediately utilized to form high-energy phosphate bonds in the form of adenosine triphosphate (ATP; the chemical-energy reservoir of the cell). The discovery of the tricarboxylic acid cycle, which is central to nearly all metabolic reactions and the source of two-thirds of the food-derived energy in higher organisms, was of vital importance to a basic understanding of cell metabolism and molecular biology.

Krebs served on the faculty of the University of Oxford from 1954 to 1967. He wrote (with the British biochemist Hans Kornberg) Energy Transformations in Living Matter (1957) and also coauthored (with Anne Martin) Reminiscences and Reflections (1981). He was knighted in 1958, and the Royal Society awarded him its Copley Medal in 1961.