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Recombinant Microdochium nivale carbohydrate oxidase and its application in an amperometric glucose sensor.

Biosensors containing recombinant carbohydrate oxidase from Microdochium nivale (rMnO) were developed by means of either chemically modified carbon paste or graphite electrode. 1-(N,N-dimethylamine)-4-(4-morpholine)benzene (AMB) and 1,1'-dimethylferrocene (DMFc) have been used as mediators. The biosensors showed a linear calibration graph up to 18 mM of glucose when operated at 0.04-0.36 V versus a saturated calomel electrode. Almost no change was detected in the sensitivity of the biosensors at pH 7.2-8. 1. The biosensors responded to other aldoses in the D-configuration, however, maximal sensitivity of the biosensor was towards D-glucose. The biosensor did not response to polyhydroxylic compounds such as D-mannitol, D-sorbitol and inositol. The advantages of the biosensors based on rMnO in comparison to Aspergillus niger glucose oxidase is a wider linear range, low sensitivity to oxygen and (in some cases) broad specificity.[1]

References

  1. Recombinant Microdochium nivale carbohydrate oxidase and its application in an amperometric glucose sensor. Kulys, J., Tetianec, L., Schneider, P. Biosensors & bioelectronics. (2001) [Pubmed]
 
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