Fig. 8.

Effects of forskolin (A) and dibutyryl cAMP (B) on the mESC frequency in the absence of external Ca²⁺. Forskolin (500 μm) or dibutyryl cAMP (0.86 mm) was applied during a horizontal bar below the abscissa. Aa andBa are from line 34 (data from 4 cells forAa and 7 cells for Ba were averaged). Error bars indicate SEM. Ab and Bb are from n-syb^ΔF33B(data from 5 cells for Ab and from 6 cells forBb were averaged). Ac andBc are fromn-syb^F33-R (data from 5 cells for Ac and from 4 cells for Bcwere averaged).