the inhibitory dissociation constant ( ki ) of [ d-pro2 , d-trp7,9 ] substance p estimated from the displacement of dose-response curves ( muscle cells ) or from schild plots ( muscle strips ) differed minimally or not at all , when either sp or sk was used as agonist , consistent with interaction of the two peptides with the same receptor subtype .
C0596981
muscle cells
C0026845
muscle