Comparison of the affinity of NTX measured by displacement of the binding of different radioligands in monkey membranes
| Ligands | Naltrexone Ki ± S.E.M. (nM) | Relative potencies |
|---|---|---|
| [3H]Bremazocine | 2.06 ± 0.15 | 1.0 |
| [3H]U69,593 | 0.61 ± 0.12 | 3.4 |
| [3H]DAMGO | 0.19 ± 0.02 | 10.8 |
4-a All Ki values represent the mean of at least three experiments; see “Data Analysis” for other details.