She focused on a protein called 5-lipoxygenase, a key enzyme that spurs the body to produce leukotrienes.

FORBES: Health

It permanently blocks a key enzyme on the surface of the flu virus, stopping it from spreading to other cells.

BBC: Flu drug 'shows promise' in overcoming resistance

Scientists at Edinburgh University say they have been able to manipulate a key enzyme found in the human body to regulate the growth of cancer cells.

BBC: Enzyme switch may help 'slow cancer tumour growth'