to determine the role of endogenous neutral endopeptidase ( nep ) , also called enkephalinase ( ec 3.4.24.11 ) , in regulating tachykinin-induced contraction of gut smooth muscle , we studied the effects of nep inhibitors on the contractile responses to substance p ( sp ) in isolated longitudinal strips of ileum or duodenum in rats and ferrets .
C0039241
tachykinin
C0038585
substance p