organism
endorphin and enkephalin, is one of the most       spectacular indications suggesting that the presence of a receptor for a certain        drug in the organism authenticates searching for an endogenous substances with       high affinity at this receptor.
endorphin and enkephalin, is one of the most       spectacular indications suggesting that the presence of a  @OBJECT$  for a certain        drug  @PREDICAT$  the  @SUBJECT$  authenticates searching for an endogenous substances with       high affinity at this receptor.