Tim Hunt

Sir Richard Timothy Hunt is a British biochemist who shared the 2001 Nobel Prize in Physiology or Medicine for discoveries about cell-cycle regulation.

Paul Nurse: A British geneticist who shared the 2001 Nobel Prize for discovering key regulators of the cell cycle. His genetic studies complemented Hunt’s biochemical discovery of cyclins.
Cyclin: A family of proteins whose concentrations rise and fall to regulate cell-cycle progression. Hunt discovered this oscillating class of proteins in dividing sea urchin eggs.
Sea urchin: A marine echinoderm whose eggs and embryos are widely used in developmental and cell biology. Hunt observed cyclin fluctuations in sea urchin eggs after fertilization.
Nobel Prize in Physiology or Medicine: An annual international prize awarded for discoveries that benefit humanity in physiology or medicine. Hunt shared the 2001 award for discoveries concerning cell-cycle regulation.
Leland H. Hartwell: An American geneticist who shared the 2001 Nobel Prize for discovering genes that control the cell cycle. His yeast genetics revealed cell-cycle checkpoints alongside Hunt’s work on cyclins.
Cyclin-dependent kinase: A protein kinase activated by cyclins that drives transitions between stages of the cell cycle. Cyclins regulate division by binding and activating these enzymes.
Sea urchin egg: The large reproductive cell of a sea urchin, often studied during its rapid early divisions. Its synchronized divisions made changing proteins detectable in Hunt’s experiments.
Cancer: A group of diseases in which abnormal cells grow and divide uncontrollably and may invade other tissues. Disrupted cyclin and cell-cycle control is a common feature of cancer.
Rosalind Franklin: A British chemist whose X-ray diffraction images contributed to discovering DNA’s structure. Hunt studied biochemistry at Cambridge during the period Franklin’s structural work shaped molecular biology.
Cell cycle: The ordered sequence of growth, DNA replication, and division through which a cell reproduces. Hunt’s Nobel-recognized discoveries explained how cells regulate this sequence.

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