Ernst Chain

Sir Ernst Chain FRS FRSA
File:Ernst Boris Chain 1945.jpg Chain in 1945
Born	Ernst Boris Chain (1906-06-19)19 June 1906 Berlin, German Empire
Died	Castlebar, County Mayo, Ireland
Citizenship	German (until 1939) British (from 1939)
Fields	Biochemistry
Institutions	Imperial College London University of Cambridge University of Oxford Istituto Superiore di Sanità University College Hospital
Alma mater	Friedrich Wilhelm University Fitzwilliam College, Cambridge
Known for	Discovery of penicillin
Notable awards	Nobel Prize in Physiology or Medicine (1945) Fellow of the Royal Society (1948) Paul Ehrlich and Ludwig Darmstaedter Prize (1954) Knight Bachelor (1969)
Spouse	Anne Beloff (m. 1948)
Children	3

Sir Ernst Boris Chain FRS FRSA (19 June 1906 – 12 August 1979) was a German-born British biochemist best known for being a co-recipient of the Nobel Prize in Physiology or Medicine for his work on penicillin.

Life and career

Dr Ernst Chain undertakes an experiment in his laboratory at the School of Pathology at Oxford University in 1944

Ernst Chain in his laboratory.

Chain was born in Berlin, the son of Margarete (née Eisner) and Michael Chain, a chemist and industrialist dealing in chemical products. His family was of both Sephardic and Ashkenazi Jewish descent. His father emigrated from Russia to study chemistry abroad and his mother was from Berlin. In 1930, he received his degree in chemistry from Friedrich Wilhelm University. His father descends from Zerahiah ben Shealtiel Ḥen who was a prominent figure among the Catalonian Jewry and whose ancestors were leading Jewish figures in Babylonia. He was a lifelong friend of Professor Albert Neuberger, whom he met in Berlin in the 1930s.

After the Nazis came to power, Chain understood that, being Jewish, he would no longer be safe in Germany. He left Germany and moved to England, arriving on 2 April 1933 with £10 in his pocket. Geneticist and physiologist J. B. S. Haldane helped him obtain a position at University College Hospital, London.

After a couple of months he was accepted as a PhD student at Fitzwilliam College, Cambridge, where he began working on phospholipids under the direction of Sir Frederick Gowland Hopkins. In 1935, he accepted a job at Oxford University as a lecturer in pathology. During this time he worked on a range of research topics, including snake venoms, tumour metabolism, lysozymes, and biochemistry techniques. Chain was naturalised as a British subject in April 1939.

In 1939, he joined Howard Florey to investigate natural antibacterial agents produced by microorganisms. This led him and Florey to revisit the work of Alexander Fleming, who had described penicillin nine years earlier. Chain and Florey went on to discover penicillin's therapeutic action and its chemical composition. Chain and Florey discovered how to isolate and concentrate the germ-killing agent in penicillin. For this research, Chain, Florey, and Fleming received the Nobel Prize in 1945.

Along with Edward Abraham he was also involved in theorising the beta-lactam structure of penicillin in 1942, which was confirmed by X-ray crystallography done by Dorothy Hodgkin in 1945. Towards the end of World War II, Chain learned his mother and sister had been killed by the Nazis. After World War II, Chain moved to Rome, to work at the Istituto Superiore di Sanità (Superior Institute of Health). He returned to Britain in 1964 as the founder and head of the biochemistry department at Imperial College London, where he stayed until his retirement, specialising in fermentation technologies.

On 17 March 1948 Chain was appointed a Fellow of the Royal Society.

In 1948, he married Anne Beloff, sister of Renee Beloff, Max Beloff, John Beloff and Nora Beloff, and a biochemist of significant standing herself. In his later life, his Jewish identity became increasingly important to him. Chain was an ardent Zionist and he became a member of the board of governors of the Weizmann Institute of Science at Rehovot in 1954, and later a member of the executive council. He raised his children securely within the Jewish faith, arranging much extracurricular tuition for them. His views were expressed most clearly in his speech 'Why I am a Jew' given at the World Jewish Congress Conference of Intellectuals in 1965.

Chain was appointed Knight Bachelor in the 1969 Birthday Honours.

Chain died in 1979 at the Mayo General Hospital in Castlebar, Ireland. The Imperial College London biochemistry building is named after him, as is a road in Castlebar.

See also

• List of Jewish Nobel laureates

External links

• [[Category:Nobel Prize in {{{1}}} winners]] including the Nobel Lecture, 20 March 1946 The Chemical Structure of the Penicillins
• Ernst Chain at Find a Grave