Catechol melanin
Encyclopedia
Catechol melanins are plant
melanin
s. They yield catechol on alkali fusion. This type of substance can be found in fungi like Ustilago
. Indole-5,6-quinone
is a chemical compound found in the oxidative browning
reaction of fruits like bananas mediated by polyphenol oxidase
from tyrosine
and catecholamines leading to the formation of catechol melanins.
Plant
Plants are living organisms belonging to the kingdom Plantae. Precise definitions of the kingdom vary, but as the term is used here, plants include familiar organisms such as trees, flowers, herbs, bushes, grasses, vines, ferns, mosses, and green algae. The group is also called green plants or...
melanin
Melanin
Melanin is a pigment that is ubiquitous in nature, being found in most organisms . In animals melanin pigments are derivatives of the amino acid tyrosine. The most common form of biological melanin is eumelanin, a brown-black polymer of dihydroxyindole carboxylic acids, and their reduced forms...
s. They yield catechol on alkali fusion. This type of substance can be found in fungi like Ustilago
Ustilago
Ustilago is a genus of approximately 200 smut fungi parasitic on grasses.There is a large research community that works on Ustilago maydis including researchers at the University of Georgia, Philipps-Universität Marburg, University of British Columbia and others...
. Indole-5,6-quinone
Indole-5,6-quinone
Indole-5,6-quinone is an indolequinone, a chemical compound found in the oxidative browning reaction of fruits like bananas where it is mediated by the tyrosinase type polyphenol oxidase from tyrosine and catecholamines leading to the formation of catechol melanin....
is a chemical compound found in the oxidative browning
Enzymatic browning
Browning is the process of becoming brown, especially referring to food. Browning foods may be desirable, as in caramelization, or undesirable, as in an apple turning brown after being cut...
reaction of fruits like bananas mediated by polyphenol oxidase
Polyphenol oxidase
Polyphenol oxidase is a tetramer which contains four atoms of copper per molecule, and binding sites for two aromatic compounds and oxygen...
from tyrosine
Tyrosine
Tyrosine or 4-hydroxyphenylalanine, is one of the 22 amino acids that are used by cells to synthesize proteins. Its codons are UAC and UAU. It is a non-essential amino acid with a polar side group...
and catecholamines leading to the formation of catechol melanins.