p1 and p2 purinoceptors mediating mechanical responses in isolated rabbit ear artery were studied by comparing responses to adenosine triphosphate ( atp ) , alpha , beta-methylene atp , and adenosine , both when endothelial cells were intact and when they had been removed by mechanical rubbing ( as confirmed by histochemical staining and near abolition of relaxation to acetylcholine ) .
C0001480
atp
C0001443
adenosine