Responsible for coloration of the retina, hair, and skin, for ten points, what is this dark brown pigment?
It consists of polymers of indole 5,6-quinone and 5,6-dihydroxyindole-2-carboxylic acid. Produced by granules in specialized cells in a complex series of reactions that start with the oxidation of tyrosine, it is found in some invertebrates and fungi, and is notably present in squid and octopus ink, but is probably better known for its role in vertebrates. Responsible for coloration of the retina, hair, and skin, for ten points, what is this dark brown pigment?
It consists of polymers of indole 5,6-quinone and 5,6-dihydroxyindole-2-carboxylic acid.
{melanin}