Bouton volume (all boutons; μm3) | 0.37 ± 0.04 | 0.31 ± 0.03 | 0.23 | 0.34 ± 0.02 |
Bouton volume (with mitochondria; μm3) | 0.45 ± 0.05 | 0.38 ± 0.04 | 0.25 | 0.41 ± 0.03 |
Bouton volume (lacking mitochondria; μm3) | 0.12 ± 0.02 | 0.11 ± 0.04 | 0.73 | 0.12 ± 0.02 |
Vesicle density (#/μm3) | 1654 ± 139 | 1301 ± 198 | 0.20 | 1477 ± 130 |
Boutons with mitochondria (%) | 74 ± 1 | 78 ± 5 | 0.49 | 76 ± 2 |
Presynaptic density area (μm2) | 0.10 ± 0.02 | 0.07 ± 0.01 | 0.20 | 0.08 ± 0.01 |
Multiple synapse boutons (%) | 34 ± 4 | 36 ± 5 | 0.72 | 35 ± 1 |