Implantable (Bio)sensors as new tools for wireless monitoring of brain neurochemistry in real time

Figure 6 Schematic representation of the platinum-based biosensors for detecting extracellular lactate in the central nervous system of awake animals. In the presence of O₂, the immobilized enzyme [lactate oxidase (LOx)] selectively converts the substrate (lactate) in the corresponding product (pyruvate) and generates H₂O₂ that is oxidized on the Pt surface.