binding sites quantitated using an s-28 analog [ leu8 , d-trp22 , 125i-tyr25 ] s-28 as radioligand ( bmax = 1.18 +/- 0.15 pmol/mg ; kd = 0.08 +/- 0.06 nm ) also exhibited greater affinity for s-28 than s-14 .
C0074854
s-28
C0037659
s-14