| 1.3377007 | Peptide |
| 1.2154891 | Opioid |
| 1.0348628 | Opioid type M |
| -0.5820684 | Opioid type X |
| -0.7130175 | Opioid type D |
| -0.9991786 | Opioid type K |
| -0.8507289 | Galanin |
| -0.93450314 | Tachykinin |
| -0.9596841 | Chemokine |
| -0.9629573 | Angiotensin |
| -0.986769 | C5a anaphylatoxin |
| -0.9963259 | Endothelin |
| -1.0046769 | Fmet-leu-phe |
| -1.0071646 | Neuromedin U |
| -1.0328255 | Somatostatin |
| -1.0439392 | CCK |
| -1.057723 | Thrombin |
| -1.0756327 | Urotensin II |
| -1.1082718 | Melanocortin |
| -1.1241999 | Interleukin-8 |
| -1.1278105 | Bombesin |
| -1.1441177 | APJ like |
| -1.1462648 | GPR37 / endothelin B-like |
| -1.1636001 | Chemokine receptor-like |
| -1.1892653 | Neuropeptide Y |
| -1.2056526 | Adrenomedullin (G10D) |
| -1.218018 | Vasopressin-like |
| -1.223151 | Bradykinin |
| -1.2286924 | Orexin & neuropeptide FF |
| -1.2490052 | Neurotensin |
| -1.2612607 | Proteinase activated |
| -0.8984404 | Hormone protein |
| -0.9000334 | Thyrotropin-releasing hormone & Secretagogue |
| -0.9320522 | Gonadotropin-releasing hormone |
| -0.94054097 | Nucleotide-like |
| -0.9979019 | Class A Orphan/other |
| -1.0034509 | Melatonin |
| -1.0690619 | Prostanoid |
| -1.0841911 | Cannabis |
| -1.0896654 | Viral |
| -1.0962899 | Olfactory |
| -1.0999676 | Platelet activating factor |
| -1.2564946 | (Rhod)opsin |
| -1.3043277 | Lysosphingolipid & LPA (EDG) |
| -1.7220126 | Amine |