Chemistry Nobel laureate Jens Christian Skou dies

Danish doctor and scientist Jens Christian Skou, a joint recipient of the chemistry Nobel prize in 1997, has died aged 99.

Skou was awarded a half share of the Nobel for discovering the sodium–potassium pump, an enzyme that transports sodium and potassium ions across the membranes of cells and is crucial for the normal functioning of nerves and muscles. The other half was divided between Paul Boyer and John Walker for their work on the synthesis of adenosine triphosphate (ATP).