Fig. 3.

Calcium uptake function in sln^−/− atria and ventricles. Ca²⁺ uptake assays were performed by using total homogenates from atria (A) and ventricles (B) of 24-week-old mice. For each atrial experiment, atria from four mice were pooled. n = 4 for each group. The V_max of Ca²⁺ uptake was obtained at pCa 6.0.