Electrophysiological properties of ReNcell CX. A, B) Example of ReNcell CX 12 days after differentiation was started using the preD protocol, responding to current (A; from ~-80 mV) or voltage (B) steps (10 pA or mV increments, 400 ms). C) Average voltage-current relationship for the peak current elicited by stepping the voltage from -60 to + 30 mV in 10 mV increments for the ReNcell CX with the preD (solid circles, n = 9) or the stdD (open circles, n = 7) protocols. D) Average IA peak current for the ReNcell CX differentiated using preD (filled circles, n = 9) or the stdD (open circles, n = 7) protocols. Despite the apparent trend there is no significant difference between these groups due to the large scatter in the data.