Figure 4. (A) The Calcium2+ titration of 1 micro Meter calmodulin from Calbiochem (CaMc) with 0 (squares), 0.57% (circles), and 5.7% (open triangles) halothane. (B) The irreversibility of the changes in CaM sub c after exposure and evaporation of 5.7% halothane. Squares = control; open triangles = 5.7% halothane; filled triangles = titration after evaporation of 5.7% halothane.