GENtoniK promoting excitability and mature resting properties of hPSC neurons. More than 90% treated neurons fired evoked APs compared with <40% of DMSO controls ( d ): representative traces shown for each group: quantification of AP frequency ( n = 11 cells per group) ( e ); AP threshold ( n = 4 for DMSO and n = 10 for GENtoniK) ( f ); and resting membrane potential (RMP) ( n = 11 per group) ( g ).