Biophysical properties of the C-type inactivation of K⁺ currents in Raw macrophages. (A) Representative traces of C-type inactivation. Cells were held at −80 mV, and pulse potentials were applied from −80 to +60 mV for 5 s. For comparison, the intensity in each group has been normalized. (B) Time constant of inactivation (τ). Values are the mean ± SEM of at least 10 independent cells. *, P < 0.05 versus control (Student’s t test).