Figure 13: Effect of lysozyme (LZ) and β-globulin. IFT isotherms of canola oil/aqueous solution of STEOL®CS-270 surfactant. Downward shift of CMC in the presence of increasing concentrations of lysozyme. Effect of β-globulin is slightly stronger than that of lysozyme at the same concentration (84 ppm). For comparison, the IFT isotherm in the presence of 1,200 ppm CF yeast protein presented at the same figure, displaying the lowest CMC recorded. Insert: CMC as function of lysozyme concentration, and IFT at SLES concentration equal to the lowest achieved CMC with lysozyme..