Fig. 2.

Changes in enzymatic activity (circles) and Soret absorption at 405 nm (diamonds) of BLC with increasing concentrations of GdmCL. The measurements correspond to a BLC concentration of 2 μM. The closed circles represent data for native BLC and the open circles data for 0.3 M NaCl-stabilized BLC. The enzyme was incubated at a desired GdmCl concentration for 6 h at 4°C and the activity was measured at the temperature of incubation by the method described in Materials and Methods.