IC50 as Calculated from Competition Assays Against 125I-Tyr12-Gastrin-I
| Peptide analog | IC50 (nM) |
| DOTA-MGS5 | 0.4 ± 0.2 |
| natIn-DOTA-MGS5 | 0.2 ± 0.04 |
| natGa-DOTA-MGS5 | 0.6 ± 0.2 |
| natLu-DOTA-MGS5 | 0.6 ± 0.1 |
| CP04 | 0.4 ± 0.1 |
| DOTA-MG11 | 0.9 ± 0.3 |
| Pentagastrin | 1.0 ± 0.2 |