Pyomelanin

Pyomelanin is one of the five basic types of melanin. It is a polymer resulting from the oxidation and polymerization of homogentisic acid (HGA).

This brownish pigment can be produced by microorganisms such as bacteria and fungi. It has several properties such as metal bonding, redox and electron shuttle, and protective roles such as anti-microbial activity or anti-oxidative stress. These properties are mainly used in cosmetics and pharmacology.

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