Table 2.

Effect of depolarization with high K⁺ on number of ER cisternal stacks in neuronal somas in dissociated cultures, expressed as number per 100 neuronal somas

Exp	Cont	2′ K+	3′ K+	2′K+/EGTA	3′K+/EGTA
1	0 (20)	20 (20)
2	0 (31)	0 (16)
3	0 (22)	83 (18)
4	0 (20)	32 (28)	110 (20)
5	0 (20)	15 (20)		0 (20)
6	0 (20)	31 (16)	65 (17)		0 (20)
7	0 (20)		74 (23)		0 (20)
Mean ± SEM	0	30 ± 12	83 ± 14		0

Statistical analysis by ANOVA with Tukey’s post-test: 3′ K⁺ is significant over other conditions (P < 0.0005 vs. cont; P < 0.05 vs. 2′K⁺; P < 0.005 vs. 3′ K/EGTA). 2′ K⁺ is barely significant over control (P < 0.1). Other multiple comparisons are all non-significant

(n) number of somas examined