In this biography
Quick facts
- Born
- 26 March 1916
- Died
- 14 May 1995
- Birthplace
- Monessen, PA, USA
- Country
- United States
- Nationality
- Not independently established
- Known for
- Connecting amino-acid sequence with recovery of an enzyme’s active conformation
Why this life matters
Connecting amino-acid sequence with recovery of an enzyme’s active conformation
Timeline
Key moments
Birth
Christian B. Anfinsen was born in Monessen, PA, USA.
Reoxidation study
Coauthored the kinetic study of ribonuclease recovery with Haber, Sela and White.
Nobel recognition
Received Nobel recognition for the work described in the official award record.
Chemistry before the folding problem
Christian Anfinsen was born in Monessen, Pennsylvania, in 1916. He graduated from Swarthmore College in 1937, earned a master’s degree in organic chemistry at the University of Pennsylvania in 1939 and completed a Harvard biochemistry doctorate in 1943. Research visits to Copenhagen and later to Hugo Theorell’s laboratory broadened his biochemical training. His early career included protein labelling and metabolism, making the eventual folding programme one development within a wider set of questions about how protein chemistry related to biological function.
A research base at the National Institutes of Health
In 1950 Anfinsen moved from Harvard to lead the Laboratory of Cellular Physiology and Metabolism at the National Heart Institute. He returned briefly to Harvard in 1962–1963 before resuming NIH work. During the 1950s, ribonuclease became a tractable way to investigate the relationship between a polypeptide chain and an active enzyme. A small, chemically characterised protein could be disrupted and then examined for recovery. That made folding an experimental question involving measurable changes rather than merely an attractive drawing of a compact chain.
Sources for this section: [4]
Recovery required more than one measurement
The 1961 paper by Anfinsen, Edgar Haber, Michael Sela and Frederick White followed reoxidation of reduced ribonuclease. It compared changes in sulfhydryl groups, physical properties and enzymatic activity. Activity did not simply return in lockstep with every early chemical change. The result supported the importance of sequence while allowing intermediate arrangements and bond reshuffling during recovery. Anfinsen’s 1962 discussion explicitly placed the findings within suitable concentration and environmental conditions, a qualification lost when the work is reduced to an unconditional slogan about all proteins.
Recognition for a specific connection
Anfinsen received half of the 1972 Nobel Prize in Chemistry for the connection between ribonuclease’s amino-acid sequence and its biologically active conformation. Stanford Moore and William Stein shared the other half for complementary research on the enzyme’s chemistry. Anfinsen died in Maryland in 1995. His contribution joined a general explanatory idea with a carefully chosen experimental system. It did not make every folding pathway instantaneous or every cellular protein independent of assistance. The enduring lesson is to connect a claim about information in a sequence with the actual chemical conditions and functional evidence used to test it.
Quick answers
Frequently asked questions about Christian B. Anfinsen
- Who collaborated on the 1961 kinetic study?
- Edgar Haber, Michael Sela and Frederick White were coauthors with Anfinsen.
- Did Anfinsen share the 1972 Chemistry Nobel?
- Yes. He received half; Stanford Moore and William Stein shared the other half for distinct ribonuclease work.
Keep exploring
Lives connected to this story
- Francis Crick
Connect Crick’s sequence-level questions with an experimental study of how a protein regained an active conformation.
- Stanford Moore
Distinguish quantitative amino-acid analysis from the refolding experiment.
- William H. Stein
Read the complementary sequence-analysis programme.
Sources and further reading
Explore the evidence
These references support the biography and offer further reading. Official records, first-person accounts and independent reporting provide different perspectives; image records document attribution and licensing.
- 1. Anfinsen, Haber, Sela and White, PNAS, 1961The kinetics of formation of native ribonuclease during oxidation of the reduced polypeptide chain
- 2. Christian Anfinsen, Comparative Biochemistry and Physiology, 1962Some observations on the basic principles of design in protein molecules
The source’s abstract supports a conditional recovery claim. It is not used as a claim that every protein folds independently in every environment.
- 3. Nobel Prize OutreachChristian B. Anfinsen — Facts
- 4. Nobel Prize OutreachChristian B. Anfinsen — Biographical
