Table I

Sizes and Speeds of the Transporting Vesicles of Membrane Proteins in Axons

Membrane proteinsTubulovesicular organellesLarge globular vesicles*
vesicle size‡speed§
lengthwidth
μmμm/s
GAP-431.51 ± 0.890.54 ± 0.22 (n = 110)0.76 ± 0.26 (n = 86)(−)
SNAP-251.09 ± 0.510.47 ± 0.15 (n = 83)0.98 ± 0.74 (n = 40)(−)
TrkA1.79 ± 2.780.53 ± 0.12 (n = 98)0.88 ± 0.58 (n = 98)(+)
synaptophysin1.48 ± 1.010.46 ± 0.13 (n = 101)0.69 ± 0.33 (n = 101)(+)
TGN-381.15 ± 0.740.65 ± 0.19 (n = 53)0.76 ± 0.50 (n = 53)(+)
  • *  The existence of large globular vesicles that colocalized with endocytotic markers was indicated as (+).  

  •  The large globular vesicles were not included.  

  • §  Retrogradely moving or stationary vesicles were not included.