Figure 7. USMC model modification with incorporation of KCNQ1, KCNQ4, KCNQ5 and hERG currents.
A, Effect of I
K1 being partially replaced by a combination of I
KCNQ1 (
KCNQ1 = 0.0032 nS pF−1), I
KCNQ4 (
KCNQ4 = 0.024 nS pF−1) and I
hERG (
hERG = 0.08 nS pF−1). Note that I
b has been replaced with I
KCNQ5 (
KCNQ5 = 0.016 nS pF−1). With this configuration, long-duration bursting APs were induced (left panel) while the whole cell K+ currents (middle panel) and the I-V relationships (right panel) matched the experimental data [44] (© Wang et al., 1998). B. Summary of the electrogenic components of the modified USMC model.