the data of the present work , together with our previously published studies ( 9 , 10 , 13 ) , where the action of exogenous adenine nucleotides , nad and adenosine on rabbit 's jejunum in vitro has been proved antagonistic to the contractile effect of various prostaglandins , suggest that prostaglandins and adenine nucleotides appear to block selectively or augment each other 's action on various organs .
C0027270
nad
C0001413
adenine nucleotides