Winners:Frances H Arnold of the US,George P Smith of the US,and Gregory P Winter of Britain.Credit:AP
Frances Arnold of the California Institute of Technology,George Smith from the University of Missouri and Gregory Winter of Britain's MRC Laboratory of Molecular Biology were awarded the prize for pioneering science in enzymes and antibodies.
Arnold,only the fifth woman to win a chemistry Nobel,was awarded half of the 9 million Swedish crown ($1.4 million) prize while fellow Smith and Winter shared the other half.
"This year's Nobel Laureates in Chemistry have been inspired by the power of evolution and used the same principles – genetic change and selection – to develop proteins that solve mankind's chemical problems,"the Royal Swedish Academy of Sciences said.
Arnold is the second woman to win a Nobel prize this year after Canada's Donna Stricklandshared the physics award on Tuesday.
Her research on enzymes – proteins that catalyse chemical reactions – laid the bedrock for the development of better industrial chemicals and pharmaceuticals.
Smith developed a method using a virus that infects bacteria to produce new proteins while Winter used the same phage display technique for the directed evolution of antibodies,with the aim of producing more effective medicines.
Humira,or adalimumab,was the first drug based on Winter's work to win regulatory approval in 2002.