the order of potency with which mammalian tachykinins and the sp antagonist , [ d-pro2 , d-trp7,9 ] sp , inhibited the binding of both radioligands was identical : sp greater than sk greater than nk greater than [ d-pro2 , d-trp7,9 ] sp , implying preferential interaction with a site that had highest affinity for sp .
C0039241
tachykinins
C0027847
nk