Frances H Arnold, George P Smith and Gregory P Winter win Nobel prize in chemistry

Briton and two Americans honoured for using evolutionary principles to develop proteins that have been used in new drugs and medical treatments

• Nobel prize in chemistry awarded for pioneering work on proteins - as it happened

Three scientists have won the Nobel prize in chemistry for their work in harnessing evolution to produce new enzymes and antibodies.

British scientist Sir Gregory P Winter and Americans Frances H Arnold and George P Smith will share the 9m Swedish kronor (770,000) prize, awarded by the Royal Swedish Academy of Sciences.