Table 1 Boltzmann parameters of Ca²⁺ conductance, charge movements and Ca²⁺ transients of control, γ₁ het and γ₁ null myotubes.

G_max (pS/pF)

V_1/2 (mV)

k (mV)

Q_max (fC/pF)

V_1/2 (mV)

k (mV)

Control, +/+

131 ± 6.2

14.7 ± 2.1

4.2 ± 0.4

5.3 ± 0.4

11.4 ± 2.5

15.4 ± 1.1

(n)

(8)

(8)

γ ₁ het, +/-

161 ± 11.5^a

14.3 ± 2.8

5 ± 0.8

5.3 ± 0.3

14.4 ± 0.6

14.7 ± 2.0

(n)

(8)

(4)

γ ₁ null, -/-

170 ± 9.6^b

10.9 ± 0.9

4.5 ± 0.4

5.3 ± 0.9

17.8 ± 1.9

15.8 ± 2.2

(n)

(12)

(8)

ΔF/Fo-V

Inactivation

ΔF/Fo_(max)

V_1/2 (mV)

k (mV)

V_1/2 (mV)

k (mV)

Control, +/+

3.9 ± 0.3

4.6 ± 1.2

10.2 ± 1.3

-4.6 ± 3.6

7.3 ± 0.2

(n)

(6)

(6)

γ ₁ het, +/-

3.3 ± 0.5

8.2 ± 3.0

10.1 ± 2.0

8.1 ± 2.3^c

8.0 ± 0.6

(n)

(4)

(8)

γ ₁ null, -/-

3.7 ± 0.4

7.3 ± 1.6

9.0 ± 1.1

8.9 ± 0.8^d

8.1 ± 0.8

(n)

(6)

(8)