Table 1. Voxel gray-scale values for the narrow regions of membrane between the connection sites of nubs and connection sites of their paired AZM/non-AZM macromolecules and for the rest of the membrane of eight synaptic vesicles.

SV	Rest of Membrane		Nubs-Ribs		Nubs-Spars		Nubs-Booms		Nubs-Pins		Nubs-non-AZM
	Nv	Avg±SD	Nv	Avg±SD	Nv	Avg±SD	Nv	Avg±SD	Nv	Avg±SD	Nv	Avg±SD
1	72082	581±41	1658	558±40	512	565±40	1432	578±42*	610	561±42	1653	560±40
2	76582	500±105	652	483±99	310	466±82	568	445±86	584	415±85	2130	431±90
3	70993	481±102	914	444±96	598	424±95	1126	438±89	772	418±93	2264	417±85
4	77597	486±97	791	433±85	389	425±82	1259	425±88	804	430±83	1330	420±89
5	69063	491±103	649	438±79	559	443±97	931	407±89	547	421±74	995	391±90
6	64417	460±86	759	413±77	362	401±70	1150	391±85	555	400±84	1764	397±88
7	72812	432±87	911	370±76	220	377±71	786	373±76	259	364±77	663	356±75
8	81576	625±19	680	605±17	325	607±15	707	608±15	575	601±16	951	610±12

N_v, number of voxels; Avg±SD, average gray-scale value (ranging from 0, black, to 1000, white) ± Standard Deviation (SD). Average gray-scale values for the regions between nubs and AZM/non-AZM macromolecules per vesicle are significantly lower (darker) than for the rest of its membrane, except for one value (asterisk), as determined by ANOVA analysis with Tukey Post Hoc test (p<0.05).