A Biosensor for the Determination of beta-galactosidase Activity: A Different Viewpoint on Biosensors


Sezginturk M. K. , DİNÇKAYA E.

ARTIFICIAL CELLS BLOOD SUBSTITUTES AND BIOTECHNOLOGY, cilt.39, ss.281-288, 2011 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 39 Konu: 5
  • Basım Tarihi: 2011
  • Doi Numarası: 10.3109/10731199.2011.560119
  • Dergi Adı: ARTIFICIAL CELLS BLOOD SUBSTITUTES AND BIOTECHNOLOGY
  • Sayfa Sayıları: ss.281-288

Özet

beta-galactosidase splits lactose into glucose and galactose. Because of its biotechnological interest, we presented a biosensor system in order to monitor beta-galactosidase activity. Immobilization steps of the biosensor were identified by cyclic voltammograms and electrochemical impedance spectroscopy. beta-galactosidase was voltammetrically detected at about +150 mV (vs. Ag/AgCl) in citrate buffer solution (0.05 M, pH 4.8). The linear response for beta-galactosidase detection was in the range of 0.0118 U mL(-1) to 0.47 U mL(-1) and a shorter response time of similar to 50 s. Our results demonstrated the biosensor's electrochemical properties and analytical characteristics were very useful and effective for monitoring of beta-galactosidase activity.