Assertion: adenosine's effect | /r/HasProperty | antagonized by methylxanthine
Facets:
value: competitively
type: MANNER
Source sentences:
text: Both the inhibitory and stimulatory effects of low concentrations of adenosine on adenylate cyclase are antagonized by methylxanthines.
text: All effects of adenosine mediated via the “R” site are competitively antagonized by methyl xanthines.