Frederick Gowland Hopkins

Sir Frederick Gowland Hopkins
OM PRS
Born (1861-06-20)20 June 1861
Eastbourne, Sussex, England, United Kingdom
Died 16 May 1947(1947-05-16) (aged 85)
Cambridge, England, United Kingdom
Nationality English
Fields Biochemistry
Institutions University of Cambridge
Alma mater King's College London
Guy's Hospital
Academic advisors Thomas Stevenson
Doctoral students Judah Hirsch Quastel
Malcolm Dixon
Other notable students J.B.S. Haldane
Known for Vitamins, tryptophan, glutathione
Notable awards Nobel Prize (1929)
Royal Medal (1918)
Copley Medal (1926)
Albert Medal (1934)
Order of Merit (1935)

Sir Frederick Gowland Hopkins OM PRS[1] (20 June 1861 – 16 May 1947) was an English biochemist who was awarded the Nobel Prize in Physiology or Medicine in 1929, with Christiaan Eijkman, for the discovery of vitamins, even though Casimir Funk, a Polish biochemist, is widely credited with discovering vitamins. He also discovered the amino acid tryptophan, in 1901. He was President of the Royal Society from 1930 to 1935.

Biography

Hopkins was born in Eastbourne, Sussex, and educated at the City of London School completing his further study with the University of London External Programme and the medical school at Guy's Hospital which is now part of King's College London School of Medicine.[2] He then taught physiology and toxicology at Guy's Hospital from 1894 to 1898.

In 1898 he married Jessie Anne Stephens (1861–1937); they had two daughters, one of whom, Jacquetta Hawkes, was married to J.B. Priestley, the author.

Also in 1898, while attending a meeting of the Physiological Society, he was invited by Sir Michael Foster to join the Physiological Laboratory in Cambridge to investigate the chemical aspects of physiology. Biochemistry was not, at that time, recognised as a separate branch of science. In June 1902 he was given a readership in biochemistry,[3] and in 1910 he became a Fellow of Trinity College, and an Honorary Fellow of Emmanuel College. In 1914 he was elected to the Chair of Biochemistry at Cambridge University, thus becoming the first Professor in that discipline at Cambridge.[4] His Cambridge students included neurochemistry pioneer Judah Hirsch Quastel and pioneer embryologist Joseph Needham.

Hopkins had for a long time studied how cells obtain energy via a complex metabolic process of oxidation and reduction reactions. His study in 1907 with Sir Walter Morley Fletcher of the connection between lactic acid and muscle contraction was one of the central achievements of his work on the biochemistry of the cell. He and Fletcher showed that oxygen depletion causes an accumulation of lactic acid in the muscle. Their work paved the way for the later discovery by Archibald Hill and Otto Fritz Meyerhof that a carbohydrate metabolic cycle supplies the energy used for muscle contraction.

In 1912 Hopkins published the work for which he is best known, demonstrating in a series of animal feeding experiments that diets consisting of pure proteins, carbohydrates, fats, minerals, and water fail to support animal growth. This led him to suggest the existence in normal diets of tiny quantities of as yet unidentified substances that are essential for animal growth and survival. These hypothetical substances he called "accessory food factors", later renamed vitamins.[5] It was this work that led his being awarded (together with Christiaan Eijkman) the 1929 Nobel Prize in Physiology for Medicine.

During World War I, Hopkins continued his work on the nutritional value of vitamins. His efforts were especially valuable in a time of food shortages and rationing. He agreed to study the nutritional value of margarine and found that it was, as suspected, inferior to butter because it lacked the vitamins A and D. As a result of his work, vitamin-enriched margarine was introduced in 1926.

Hopkins is credited with the discovery and characterisation in 1921 of glutathione extracted from various animal tissues.[6] At the time he proposed that the compound was a dipeptide of glutamic acid and cysteine. The structure was controversial for many years but in 1929 he concluded that it was a tripeptide of glutamic acid, cysteine and glycine.[7] This conclusion agreed with that from the independent work of Edward Calvin Kendall.[8]

During his life, in addition to the Nobel Prize, Hopkins was awarded the Royal Medal of the Royal Society in 1918 and the Copley Medal of the Royal Society in 1926. Other significant honours were his election in 1905 to fellowship in the Royal Society, Great Britain's most prestigious scientific organisation; his knighthood by King George V in 1925; and the award in 1935 of the Order of Merit, Great Britain's most exclusive civilian honour. From 1930 -1935 he served as president of the Royal Society and in 1933 served as President of the British Association for the Advancement of Science.

He died on 16 May 1947 in Cambridge and is buried at the Parish of the Ascension Burial Ground in Cambridge, with wife Lady Jessie Ann Hopkins.[9][10]

References

  1. ↑ Dale, H. H. (1948). "Frederick Gowland Hopkins. 1861–1947". Obituary Notices of Fellows of the Royal Society. 6 (17): 115–126. doi:10.1098/rsbm.1948.0022.
  2. ↑ Needham, J. (1962). "Sir Frederick Gowland Hopkins, O.M., F.R.S. (1861–1947)". Notes and Records of the Royal Society. 17 (2): 117–126. doi:10.1098/rsnr.1962.0014.
  3. ↑ "University intelligence". The Times (36783). London. 2 June 1902. p. 9.
  4. ↑ "Hopkins, Frederick Gowland (HPKS900FG)". A Cambridge Alumni Database. University of Cambridge.
  5. ↑ Hopkins, F. G. (1912). "Feeding experiments illustrating the importance of accessory factors in normal dietaries". The Journal of Physiology. 44 (5–6): 425–460. doi:10.1113/jphysiol.1912.sp001524. PMC 1512834Freely accessible. PMID 16993143.
  6. ↑ Simoni, R. D.; Hill, R. L.; Vaughan, M. (2002). "On glutathione. II. A thermostable oxidation-reduction system (Hopkins, F. G., and Dixon, M. (1922) J. Biol. Chem. 54, 527–563)". The Journal of Biological Chemistry. 277 (24): e13. PMID 12055201.
  7. ↑ Hopkins, Frederick Gowland (1929). "On Glutathione: A Reinvestigation" (PDF). J. Biol. Chem. 84: 269–320.
  8. ↑ Kendall, Edward C.; McKenzie, Bernard F.; Mason, Harold L. (1929). "A Study of Glutathione. I. Its Preparation in Crystalline Form and its Identification". J. Biol. Chem. 84: 657–674.
  9. ↑ A Guide to Churchill College, Cambridge: text by Dr. Mark Goldie, pages 62 and 63 (2009)
  10. ↑ Trinity College Chapel

External links

This article is issued from Wikipedia - version of the 11/16/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.