membrane-enriched preparations from frog brain homogenates were shown to contain high-affinity receptors ( kd = 0.78 +/- 0.34 nm ; bmax = 103 + 12.7 fmoles/mg protein ) with pharmacological specificity for [ dtrp ] substituted s14 and s28 analogs .
C0037659
s14
C0074854
s28