| A | active |
| A2AR | adenosine A2A receptor |
| APJR | apelin receptor |
| AT1R | angiotensin receptor 1 |
| Azi | p-azido-phenylalanine |
| β2AR | β2 adrenergic receptor |
| B1/2R | bradykinin receptor 1/2 |
| BNPS-skatole | 3-bromo-3-methyl-2-(2-nitrophenylthio)-3H-indole |
| Bpa | p-benzoyl-phenylalanine |
| BRET | bioluminescence resonance energy transfer |
| BTFA | 3-bromo-1,1,1-trifluoroacetone |
| CCR5 | CC chemokine receptor 5 |
| CGRP | calcitonin gene-related peptide |
| CRF | corticopin-releasing factor |
| CRF1/2R | corticopin-releasing factor receptor 1/2 |
| CuAAC | copper-catalyzed azide-alkyne cycloaddition |
| CXCL12 | CXC chemokine ligand 12 |
| CXCR4 | CXC chemokine receptor 4 |
| CPMG | Carr-Purcell-Meiboom-Gill (pulse sequence) |
| cwEPR | continuous wave EPR |
| DDM | n-dodecyl-β-d-maltopyranoside |
| DEER | double electron-electron resonance |
| ECD | extracellular domain |
| ECL | extracellular loop |
| EM | electron microscopy |
| EPR | electron paramagnetic resonance |
| ETB | endothelin B receptor |
| FlAsH | fluorescein arsenical hairpin binder |
| FRET | fluorescence/Förster resonance energy transfer |
| FTIR | Fourier-transform infrared spectroscopy |
| GLP-1 | glucagon-like peptide-1 |
| GLP1R | glucagon-like peptide-1 receptor |
| GLR | glucagon receptor |
| GPCR | G protein-coupled receptor |
| HDX | hydrogen-deuterium exchange |
| HRF | hydroxyl radical footprinting |
| I | inactive |
| LRET | lanthanoid resonance energy transfer |
| MIP1α | macrophage inflammatory protein 1α (=CCL3) |
| MS | mass spectrometry |
| MTSL | (1-oxyl-2,2,5,5-tetramethyl-pyrroline-3-methyl) methanethiosulfonate |
| ncAA | non-canonical amino acid |
| NMR | nuclear magnetic resonance |
| NOE | nuclear Overhauser effect |
| NPY | neuropeptide Y |
| NTS1R | neurotensin receptor 1 |
| PACAP | pituitary adenylate cyclase-activating peptide |
| PAC1R | pituitary adenylate cyclase-activating peptide receptor 1 |
| PTH1R | parathyroid hormone receptor 1 |
| REDOR | rotational-echo double-resonance |
| SAR | structure activity relationship studies |
| SDS-PAGE | sodium dodecyl sulfate–polyacrylamide gel electrophoresis |
| SDSL | site-directed spin labeling |
| SPAAC | strain-promoted azide-alkyne cycloaddition |
| STD | saturation transfer difference spectroscopy |
| TCS | transferred cross saturation spectroscopy |
| TET | 2,2,2-trifluoro-ethanethiol |
| TM | transmembrane |
| trNOESY | transferred nuclear Overhauser effect spectroscopy |
| Uaa | unnatural amino acid |
| Ucn | Urocortin |
| Y1/2R | neuropeptide Y receptor 1/2 |
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