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Cover Picture: Electron Transfer between Genetically Modified Hansenula polymorpha Yeast Cells and Electrode Surfaces via Os‐complex modified Redox Polymers (ChemPhysChem 4/2011)
Author(s) -
Shkil Halyna,
Schulte Albert,
Guschin Dmitrii A.,
Schuhmann Wolfgang
Publication year - 2011
Publication title -
chemphyschem
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201190016
Subject(s) - electron transfer , redox , electron transport chain , yeast , membrane , chemistry , intracellular , electrode , biophysics , bioelectrochemistry , extracellular , electrochemistry , biochemistry , photochemistry , inorganic chemistry , biology
The cover picture depicts the possible electron‐transfer pathway between genetically modified Hansenula polymorpha yeast cells and an electrode surface via Os‐complex modified redox polymers. The recombinant cells overexpress flavocytochrome b 2 (FC b 2 ), which is involved in L ‐lactate oxidation within the mitochondria. Overproduction of FC b 2 seems to enhance the ability of the cells to exchange charges with extracellular electron acceptors across the membrane. Close contact of the Os‐complex modified polymer to the cell wall appears to be a prerequisite for the transfer of electrons from the intracellular FC b 2 / L ‐lactate catalytic cycle to an electrode surface and suggests the critical involvement of a plasma membrane located redox system. On p. 806 W. Schuhmann et al. give insight into the functioning of the yeast‐cell‐based bioelectrochemical electron‐transfer pathway. The authors thank Dr. M. Gebala for designing the picture.