Fig. 2.

Effects of Ca²⁺ channel blockers on the mESC frequency inn-syb^ΔF33B. The frequency of mESCs were counted in the 20 mm K⁺ solution in the presence of 3 μm TTX. Conditions for each experiment are written below the abscissa. Error bars indicate SEM.Two asterisks on each column indicate statistical difference at p = 0.01 from control (blank column).