Table 1.

Characteristics of secretory spikes obtained from chromaffin cells of CgB-KO mice

	Imax (pA)	Q (pC)	t1/2 (ms)	m (pA/ms)	Ft1 (ms)	Ft2 (ms)	n (cells)
WT	61.4 ± 7.8	0.39 ± 0.05	6.1 ± 0.5	27.5 ± 3.5	2.9 ± 0.2	5.9 ± 0.6	20
CgB-KO	33.5 ± 5.8†	0.27 ± 0.04¥	6.4 ± 0.4	14.2 ± 2.7§	3.7 ± 0.2	6.1 ± 0.4	20
Change	−45%	−31%	+5%	−48%	+28%	+22%

See Segura et al. (2000) for explanation. Data are expressed in the units in parentheses.

^†p = 0.02; ^¥p = 0.054; ^§p = 0.001 (U Mann–Whitney).