in the present study we investigated the effects of adenine and guanine nucleotides as well as monovalent and divalent cations on rat brain ss receptors quantitated with radioiodinated analogs of ss-14 ( [ 125i-tyr11 ] ss14 , referred to in this paper as ss-14 ) and ss-28 ( [ leu8 , d-trp22 , 125i-tyr25 ] ss-28 , referred to as ltt* ss-28 ) in order to determine if distinct receptor sites for ss-14 and ss-28 could be distinguished on the basis of their modulation by nucleotides and ions .
C0037659
ss-14
C0074854
ss-28