TABLE 2.

Slow calcium signal properties under different conditions

	Calcium	Calcium-free	TTX	Ryanodine*	Nifedipine*	Bay K*
t1/2	54.34 ± 4.56 (12)	98.40 ± 7.92† (12)	NS (7)	66.61 ± 5.17‡ (10)	NS (13)	37.27 ± 2.56§ (16)
(ΔF/Fo)max	0.735 ± 0.079 (12)	0.733 ± 0.046 (12)	NS (7)	0.974 ± 0.073‡ (10)	NS (13)	0.880 ± 0.044‡ (16)

Values given represent mean ± SE (n); NS, no signal.

^*Experiments performed in calcium-free media.

^†P < 0.01 vs. calcium condition.

^‡P < 0.05 vs. calcium-free condition.

^§P < 0.01 vs. calcium-free condition.