Table 1.

Quantification of synaptic parameters in the SCG of α3 null-mutant and control littermates at neonatal P6-P7

	α3-/-	Control
Small clear synaptic vesicles (nm, diameter)	30 ± 1.5	33 ± 1.2
Large dense core vesicles (nm, diameter)	71 ± 3.3	71 ± 5.6
Docked vesicles (# per synapse)	0.9 ± 0.3	1.1 ± 0.2
Multivesicular bodies (# per synapse)	0.7 ± 0.2	0.5 ± 0.3
Synaptic cleft width (nm, diameter)	25 ± 1.2	24 ± 0.7
Active zone length (nm, diameter)	261 ± 30	263 ± 22
PSD length (nm, diameter)	265 ± 19	273 ± 29

Data represent means ± SEMs; n = 29 α3^-/- synapses and 36 control synapses from 9 α3^-/- and 6 control animals, respectively. Docked vesicles per synapse are defined as those that are located less than one vesicle diameter from the presynaptic plasma membrane. PSD, Postsynaptic density.