Table 1. Summary of AMPA receptor diffusion that are synaptically-bound, measured with various fluorophores and tags.
| Fluorophore | Size (nm) | Tag | Diffusion coefficient (μm2/s) | Trajectory range (nm) (±width) | Synaptic receptors (%) |
|---|---|---|---|---|---|
| Big Qdot | ~20 | SA | 10-2.5±0.02 | 390 ± 140 | 5 |
| Small Qdot | ~10 | SA | 10-2.41±0.02 | 418 ± 172 | 75 |
| GBP | 10-2.53±0.02 | 420 ± 170 | 82 (92) | ||
| mSA | 10-2.59 ± 0.02 | 363 ± 144 | 88 (84) | ||
| Atto647 | ~5 | SA | 10-2.55 ± 0.02 | 380 ± 156 | 77 (73) |
| CF633 | 10-2.70 ± 0.01 | 380 ± 140 | 90 (93) |
Note: The first and second number for the synaptic receptors corresponds to the percentage of AMPAR in the lower left hand box and the area under the Gaussian curve for the trajectories, respectively, as outlined in each peaks of Figures 3–5. (The bQD data is for the 5% of all the AMPARs that are bound near a Homer1c, that is in the synapse. See discussion.).