Assertion: adenosine's receptor | /r/HasProperty | present on the cell membrane of mast
Facets:
value: clearly
type: MANNER
Source sentences:
text: Although A 2A , A 2B and A 3 receptors are clearly present on the cell membrane of mast cells42, there is uncertainty regarding which receptor(s) account for the increased mast-cell activation following adenosine receptor activation.