Physics And Chemistry Basis Of Biotechnology - De Cuyper - tiera.ru

Elisabeth Csöregi et al
contains several cofactors (haem and pyrroloquinolin quinone /PQQ, denoted QH-
ADH). Three different biosensor designs have been tested and optimised: (i) Type I
electrodes were based on the enzyme simply adsorbed on the electrode surface (direct
electron transfer) (see scheme 7a), (ii) Type II electrodes integrated the enzyme into an
Os-modified redox polymer (mediated electron transfer) (see scheme 7b), and (iii) Type
III electrodes entrapped the same enzyme into a conducting polymer network
(polypyrrole) (see scheme 8).
Scheme 7a Electron-transfer pathway for Type I QH-ADH electrodes.
Scheme 7b. Electron-transfer pathway for Type II QH-ADH electrodes.
Scheme 8. Electron-transfer pathway for Type Ill QH-ADH electrodes.
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