| 0.68272674 | Peptide |
| 0.3606157 | Opioid |
| 0.3321501 | Opioid type X |
| -1.1197572 | Opioid type M |
| -1.3666155 | Opioid type K |
| -1.3681566 | Opioid type D |
| -0.9868522 | Chemokine |
| -1.0267253 | Galanin |
| -1.0604205 | Endothelin |
| -1.080982 | Tachykinin |
| -1.0837128 | Thrombin |
| -1.0924495 | Neuromedin U |
| -1.0990921 | Fmet-leu-phe |
| -1.1141391 | Urotensin II |
| -1.1229603 | CCK |
| -1.1280314 | Neuropeptide Y |
| -1.1297269 | C5a anaphylatoxin |
| -1.1466237 | Angiotensin |
| -1.1586932 | Bombesin |
| -1.185174 | Melanocortin |
| -1.1859329 | GPR37 / endothelin B-like |
| -1.1918021 | APJ like |
| -1.2042125 | Interleukin-8 |
| -1.2194111 | Adrenomedullin (G10D) |
| -1.2541871 | Vasopressin-like |
| -1.2624336 | Bradykinin |
| -1.2702663 | Chemokine receptor-like |
| -1.2708716 | Proteinase activated |
| -1.2851617 | Orexin & neuropeptide FF |
| -1.2885481 | Neurotensin |
| -1.3138489 | Somatostatin |
| -0.9085518 | Class A Orphan/other |
| -1.000579 | Gonadotropin-releasing hormone |
| -1.0504396 | Thyrotropin-releasing hormone & Secretagogue |
| -1.0644774 | Hormone protein |
| -1.0866234 | Prostanoid |
| -1.1012921 | Melatonin |
| -1.1085824 | Cannabis |
| -1.1688604 | Platelet activating factor |
| -1.2283435 | (Rhod)opsin |
| -1.2532772 | Viral |
| -1.2593681 | Olfactory |
| -1.3435633 | Lysosphingolipid & LPA (EDG) |
| -1.3452713 | Nucleotide-like |
| -1.8105136 | Amine |