Table I. Quantitative ultrastructural analysis of synapses with or without Pclo28.

Parameter	Control	+Pclo28
AZ length (nm)	0.258 ± 0.142	0.229 ± 0.102
Docked SVs/AV length (n/μm)	13.87 ± 6.26	14.29 ± 5.30
SV density (n/μm2)	163.8 ± 58.36	169.0 ± 49.02
Percentage of SVs labeled	20.4 ± 12.5%	24.5 ± 14.8%

All data are from boutons with at least two clearly labeled synaptic vesicles opposed to a distinct synaptic junction. All parameters were measured by an observer blind to phenotype. n = 64 boutons with 66 active zones for control and 53 boutons with 55 active zones for +Pclo28. Data are shown ± standard deviation. t tests revealed no significant differences, with no P < 0.05.