On the other hand, the specific enhancement of IK1 through infection with adenoviral constructs of the KCNJ2-encoded IK1 channel protein Kir2.1 by Vaidyanathan et al. (2016) resulted in hiPSC-CMs with a peak outward current density of IK1 at −50 mV of 4.7 ± 1.5 pA/pF (mean ± SEM, n = 7), which is significantly higher than that observed in human ventricular myocytes (Figure 2A). The gene discussed is KCNJ2; the disease is infection.