The tyrosinase belongs to the enzyme class of polyphenol oxidases. It catalyses the first two reactions (hydroxylation and oxidation) of the melanin biosynthesis.

In addition to tyrosinase, a second enzyme called catechol oxidase is capable of oxidising diphenols such as catechol. "Thus, both enzymes are responsible for the browning reaction," says Rompel.

In addition to tyrosinase, a second enzyme called catechol oxidase is capable of oxidising diphenols such as catechol. "Thus, both enzymes are responsible for the browning reaction", says Rompel.

The researchers were able to demonstrate that the enzyme responsible is already formed ... of the C-terminal domain resulting in the active form of tyrosinase. As a result of this reaction, ...