Table 3. Effects of variation of... | Rockefeller University Press

Table 3.

Effects of variation of extracellular [Ca²⁺] on Ca²⁺ transients

Strain	Myofiber ID	V_test	1.8 mM Ca²⁺	5.3 mM Ca²⁺	Ratio
Strain	Myofiber ID	V_test	Peak $\dot{F}$	Peak $\dot{F}$	Ratio
		mV	u.a./ms	u.a./ms
BALB/c	20160907a	20	22.29	28.06	1.26
	20160908a	20	12.00	15.34	1.28
	20160908e	40	16.30	17.20	1.05
	20160908f	20	19.47	24.29	1.25
				Mean	1.21
				SEM	0.05

B6D2F1	20160504d	20	40.24	48.43	1.20
	20160520a	40	5.45	4.64	0.85
	20160506d	40	4.24	9.12	2.15
	20160506a	40	7.09	15.64	2.21
	20160506c	20	7.25	14.22	1.96
	20160504e	40	65.17	94.35	1.45
	20160511c	40	22.89	59.42	2.59
				Mean	1.8
				SEM	0.24

Strain	Myofiber ID	V_test	1.8 mM Ca²⁺	5.3 mM Ca²⁺	Ratio
Strain	Myofiber ID	V_test	Peak $\dot{F}$	Peak $\dot{F}$	Ratio
		mV	u.a./ms	u.a./ms
BALB/c	20160907a	20	22.29	28.06	1.26
	20160908a	20	12.00	15.34	1.28
	20160908e	40	16.30	17.20	1.05
	20160908f	20	19.47	24.29	1.25
				Mean	1.21
				SEM	0.05

B6D2F1	20160504d	20	40.24	48.43	1.20
	20160520a	40	5.45	4.64	0.85
	20160506d	40	4.24	9.12	2.15
	20160506a	40	7.09	15.64	2.21
	20160506c	20	7.25	14.22	1.96
	20160504e	40	65.17	94.35	1.45
	20160511c	40	22.89	59.42	2.59
				Mean	1.8
				SEM	0.24

Fluorescence signals were recorded in response to large depolarizing pulses in reference 1.8 mM external [Ca²⁺] and after changing external [Ca²⁺] to 5.3 mM to keep total divalent cation concentration constant. [Mg²⁺] was 3.5 mM in the reference solution and 0 mM in the high-[Ca²⁺] solution. In both strains, the differences in peak amplitude in the two conditions were significantly different (P < 0.05).

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