Figure 2. Cyclic voltammograms of cytochrome P450 2B4 immobilized on the glassy carbon, modified by sodium montmorillonite colloid (Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀) and Pt nanoparticles in argon-saturated 0.1 M potassium phosphate buffer, 0.05 M KCl, pH 7.4, in air saturated buffer, and in the presence of 8 mM aminopyrine, scan rate 10 V s^-1