Cyclic voltammetric and nanogravimetric studies of NADP+ redox transformations on a yeast-modified platinum electrode |
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| Institution: | 1. Universidad del País Vasco BCMaterials UPV-EHU, Leioa, 48940 Spain;2. Ural Federal University, Ekaterinburg, 620000 Russia;3. I.Kant Baltic Federal University, Kaliningrad, 23601 Russia;4. SGIker, ServiciosGenerales de Investigación, Universidad del País Vasco (UPV/EHU), Bilbao, 48080 Spain;5. Institute of Electrophysics, Ural Division, RAS, Ekaterinburg, 620016 Russia;6. Siberian State Medical University, Tomsk, 634050 Russia;7. National Research Tomsk Polytechnic University, Tomsk, 634050 Russia;1. University of Belgrade, Faculty of Physical Chemistry, Studentski trg 12-16, 11158 Belgrade, Serbia;2. The Vin?a Institute for Nuclear Sciences, Laboratory for Theoretical and Condensed Matter Physics, 11001 Vin?a, Serbia;3. ICEMS, Instituto Superior Técnico, TU Lisbon, Av. Rovisco Pais, 1049e001 Lisboa, Portugal;4. Serbian Academy of Sciences and Arts, Knez Mihajlova 35, 11000 Belgrade, Serbia;1. Department of Biochemistry and Molecular Biology, Centre of Postgraduate Medical Education, Marymoncka 99/103, 01-813, Warsaw, Poland;2. Centre of Radiochemistry and Nuclear Chemistry, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195, Warsaw, Poland;3. Department of Immunohematology, Centre of Postgraduate Medical Education, Marymoncka 99/103, 01-813, Warsaw, Poland;4. Chemical Faculty, Gdansk University of Technology, Narutowicza 11/12, Gdansk, 80-233, Poland;5. Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland;1. Gulhane Military Medical Academy, Department of Plastic Surgery, Ankara, Turkey;2. Gulhane Military Medical Academy, Department of Pharmacy, Ankara, Turkey;3. Stanford University, Department of Bioengineering, Stanford, CA, USA;4. Gulhane Military Medical Academy, Department of Radiology, Ankara, Turkey;5. Gulhane Military Medical Academy, Department of Pathology, Ankara, Turkey;6. Gulhane Military Medical Academy, Department of Biophysics, Ankara, Turkey;1. State Key Laboratory on Integrated Optoelectronics, Jilin University, 2699 Qianjin Street, Changchun 130012, China;2. College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China;3. Institute of Semiconductors, Chinese Academy of Sciences, No A35 QingHua East Road, Beijing 100083, China |
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| Abstract: | The dominant voltammetric response of a yeast suspension in neutral or slightly alkaline media can be assigned to the redox transformations of nicotinamide adenine dinucleotide (NAD+/NADH) and nicotinamide adenine dinucleotide phosphate (NADP+/NADPH). By immobilization of yeast on platinum, a stable electrode can be prepared which shows an electrocatalytic activity towards the reduction of NADP+ and the reoxidation of the product formed. Reversible cyclic voltammetric responses were obtained. The peak currents depend practically linearly on the NADP-Na2 concentration and on the square root of the scan rate. The surface mass changes accompanying the redox transformations were monitored by an electrochemical quartz crystal nanobalance. |
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