the action of atp in this preparation was antagonized by tetrodotoxin ( 0.1 mug/ml ) , hyoscine ( 0.1 mug/ml ) and strychnine ( 5 mug/ml ) .6 desensitization of the vagus nerve/oesophagus preparation to atp did not produce any antagonism of the contractions to nerve stimulation.7 adenosine and amp produced relaxations and adp and atp contractions in the rectum preparation .
C0001443
adenosine
C0001480
atp