Figure 4.

pCa–tension relationship is not affected by DC3B treatment. Rabbit portal vein strips incubated for 48 h with or without DC3B were permeabilized with α-toxin (see MATERIALS AND METHODS). Isometric tension was measured at each pCa and normalized to the maximal Ca²⁺-induced contraction (pCa 4.5) of each strip as 100%.