Figure 5From: A Metabolic Biofuel Cell: Conversion of Human Leukocyte Metabolic Activity to Electrical CurrentsComparison of open circuit potentials (bars) and currents (lines) obtained from the supernatant (PBS used to wash the cells during the initial Ficoll isolation procedure) for both the WBCs (top) and PBMCs (bottom). Relatively small currents to no currents were observed for the PEM fuel cell apparatus.Back to article page