the relative potencies of tachykinin peptide analogs competing for binding of [ 125i ] bolton hunter-conjugated substance p ( [ 125i ] bh-sp ) or [ 125i ] bolton hunter-conjugated eledoisin ( [ 125i ] bh-ed ) in slide-mounted rat brain sections are very different , indicating the presence of two distinct tachykinin binding sites .
C0038585
substance p
C0039241
tachykinin