however , their actions could be divided into at least two categories on the basis of similar kinetics of contractions , differential sensitivity to the tachykinin antagonist ( d-arg1 , d-pro2 , d-trp7,9 , leu11 ) substance p and specific cross-protection against phenoxybenzamine inactivation by structurally related tachykinins .
C0038585
substance p
C0039241
tachykinins