Fig. 5.

Based on the cumulative-response (C-R) curves of gentamicin on ST (A), PTT (B) and ETT (C), MgCl₂ shifts curves to the left; hence, it augments the potency of gentamicin. The concentration of gentamicin is transformed to log concentration. Data are presented as mean ± SEM. The unit of concentrations for Mg is mM. n is the number of experiments. Gm: gentamicin, Mg: magnesium chloride, ST: single twitch, PTT: peak tetanic tension, ETT: end tetanic tension. ^*P < 0.05, vs. Mg 1 mM, and ^†P < 0.05, vs. Mg 2 mM by t-test with Bonferroni's correction.