Photo-Excitable Membranes. Photoinduced Potentiometric Response of Poly (vinyl chloride)/Spirobenzopyran/Nonactin Composite Membrane Modified with Adenosine Deaminase and Asparaginase

The surface of poly(vinyl chloride)／spirobenzopyran／nonactin composite membrane was coated with adeno・ sine deaminase an(1asparaginase layers to examine the effect of the enzymatic reactions on the photoinduced potentiometric response of the membrane．The photolesponse was modulated by tke enzymatic reactions occurring on the membrane surface，(1epending on the concentration of a(ienosine or asparagine in the aqueous solu-