| Term | Definition |
| Rab proteins | vesicle proteins, monomeric GTPases, tether them at the appropriate target membrane |
| Rim proteins | Rab-binding proteins on plasma membrane surface |
| vSNARE (synaptobrevin) | on surface of vesicle binds tSNARE, mediates fusion |
| tSNARE (syntaxin, SNAP25) | on surface of target membrane, binds vSNARE, mediates fusion |
| complexin | Binds SNARE complex, clamps it prior to Ca++ signal |
| synaptotagmin | Ca++-dependent signal for fusion |
| munc 18 | Binds syntaxin and regulates SNARE complex formation |
| synaptophysin | Binds synaptobrevin and regulates SNARE complex formation |
| NSF/SNAP complex | Dissociates and recycles SNARE proteins (different SNAPs) |