1.   The powerful inhibitor may explain why cartilage is a tissue that has no blood vessels.

2.   To their delight, eight of the molecules were powerful inhibitors of oleamide hydrolase.

3.   Further tests showed that aaAT is a powerful inhibitor of vessel formation with an action about like that of angiostatin and endostatin, said Folkman.

4.   The compound is a powerful inhibitor of neuraminidase, an enzyme that is essential for the reproduction of the flu virus.