Dependencies of relative rates of catalase activity on the concentration of H2O2 and determination of the Km and Vmax (kcat) values using the Lineweaver–Burk plot in the case of scz-IgG8 (0.74 μM) and scz-IgG14 (0.72 μM).

The error of the initial rate determination from three experiments in every case did not exceed 7–10%. For details, see Materials and methods.