Abstract
A biosensor is a self-contained integrated device, which is capable of providing specific quantitative or semiquantitative analytical information using a biological (or biomimetic) recognition element, which is retained in direct spatial contact with an electrochemical transduction element. One of the main features of biosensors is the remarkable selectivity that their biological components confer on them. Enzymes are the most common and well-developed recognition system of the family known as catalytic biosensors. This mini-review is focused on enzyme-based biosensors for medical applications. In particular, the new trends for the technology are described. A special emphasis is devoted to the non-invasive and painless monitoring of body metabolites, such as glucose.
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