| TEM | Transmission electron microscopy |
| Cryo-ET | Cryo-electron tomography |
| SS-ET | Serial section electron tomography |
| MVB | Multivesicular body |
| SNARE | Sensitive factor attachment protein receptor |
| HPF-FS | High-pressure freezing followed by freeze substitution |
| Cryo-FIB | Cryo-focused ion beam milling |
| EV | Extracellular vesicle |
| CPS | Conventional protein secretion |
| ER | Endoplasmic reticulum |
| TGN | Trans-Golgi network |
| UPS | Unconventional protein secretion |
| EXPO | Exocyst-positive organelles |
| ROI | Regions of interest |
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