Giant Raman scattering of alkaline phosphatase, horseradish peroxidase and lactoperoxidase on silver electrodes

Surface enhanced Raman scattering of three enzymes--alkaline phosphatase, horseradish peroxidase and lactoperoxidase is studied. The intensity of normal vibrations of definite amino acids is determined by their orientation on the surface and depends on the electrode potential. Alkaline phosphatase and lactoperoxidase make a complex with silver ions.