Table 1.

Endocytic structures in FM1-43 labeled boutons

StructuresLocationBouton 1Bouton 2Bouton 3
LVs<300 nm*presynaptic118125118
<300 nm1-160Schwann cell101711
Near endosomes8112
Other750
Total143148141
Coated pits*Presynaptic232220
1-160Schwann cell543
Endosomes024
Total282827
EndosomesUnlabeled032
Labeled112
Deep membrane invaginations*Presynaptic412
Presynaptic area (μm2)7.711.19.1
  • * Presynaptic membrane;

  • F1-160 plasma membrane underlying Schwann cell.