Kidney Cells Make Implantable Power Source

One of the potentially useful things that a living cell can do is pump ions across its membrane. Simon Levinson, a biophysicist at the University of Colorado Medical School in Denver, US, says this generates a potential difference and so could be exploited to make a biobattery. Levinson believes that kidney cells, which are particularly good at transporting ions, could be well suited to making a miniature battery. This would be formed by stacking up large numbers of cell layers to boost the voltage and current they can produce

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