Frederick Sanger

Biography

Frederick Sanger (13 August 1918 – 19 November 2013) was a British biochemist who achieved the rare feat of winning the Nobel Prize in Chemistry twice. He was one of only three people to win multiple Nobel Prizes in the same category. Born in Rendcomb, Gloucestershire, Sanger changed how we understand protein structure and pioneered techniques for DNA sequencing, which transformed molecular biology.

Sanger's first significant scientific breakthrough was his detailed work on protein sequencing, especially his determination of the complete amino acid sequence of insulin. This achievement in the early 1950s showed for the first time that proteins have unique, definite structures rather than random amino acid arrangements. His careful method involved breaking down insulin into smaller fragments using chemical reagents, then analyzing these to determine their sequence. This work gave key evidence for the new understanding of how genetic information translates into protein structure, earning him the 1958 Nobel Prize in Chemistry.

After succeeding in protein sequencing, Sanger turned to nucleic acids and started developing methods for determining DNA sequences. At the new Laboratory of Molecular Biology in Cambridge, he created the first practical DNA sequencing technique, known as the Sanger method or chain termination method. This groundbreaking approach used modified DNA building blocks that stopped chain growth at specific points, letting researchers read the sequence of genetic material. The technique made large-scale genetic analysis possible for the first time and became the basis for many advances in molecular biology and genetics.

Sanger's DNA sequencing method earned him a share of the 1980 Nobel Prize in Chemistry, which he received along with Walter Gilbert and Paul Berg for their work on DNA analysis. His technique played an important role in early genome projects and remained the main sequencing method for decades. Throughout his career, Sanger focused on developing useful methods that helped other researchers further their studies. He married Margaret Joan Howe and received many honors beyond his Nobel Prizes, including Fellowship of the Royal Society, the Copley Medal, and the Albert Lasker Award for Basic Medical Research. Sanger died in Cambridge in 2013, having seen his sequencing methods aid the Human Genome Project and the rise of modern genomics.