Assertion: hydrogen sulfide | /r/CapableOf | relax blood vessels
Facets:
value: in vitro
type: TEMPORAL
Source sentences:
text: Although both nitric oxide and hydrogen sulfide relax blood vessels in vitro, their mechanisms of action differ: nitric oxide activates the enzyme guanylyl cyclase, whereas Template:Chem activates ATP-sensitive potassium channels in smooth muscle cells.