Assertion: viagra | /r/CapableOf | inhibit enzyme
Facets:
value: on a molecular level
type: OTHER
Source sentences:
text: Viagra inhibits an enzyme called phosphodiesterase-5 (PDE5) which destroys the cGMP.
text: On a molecular level, sildenafil inhibits an enzyme called phosphodiesterase 5 (PDE5), and prevents this enzyme from working too quickly, according to the U.S. National Library of Medicine.