PATHOLOGY

Detailed explanation-1: -Pheomelanin, formed by oxidation of 5-S-Cys-dopamine and 5-S-Cys-dopa (l-tyrosine is polymerized with l-cysteine), is a yellowish-to-reddish color found in red hair, feathers, and freckles. Allomelanin is a dark brown-to-black colored pigment found in plants.

Detailed explanation-2: -A type of melanin pigment that is made up of benzothiazine units and is responsible for yellow and pink to red hues or pigmentations such as in hair, lips, etc. Melanin is a term to refer to a group of pigments produced from the oxidation of tyrosine, followed by polymerization.

Detailed explanation-3: -Pheomelanin is a lighter pigment found in red hair, and is concentrated in the redder areas of the skin such as the lips. Because people with red hair are less able to make the dark eumelanin pigment, their skin is generally quite pale and burns easily with sun exposure.

Detailed explanation-4: -Pheomelanin, which is produced when melanocytes are malfunctioning due to derivation of the gene to its recessive format is a cysteine-derivative that contains polybenzothiazine portions that are largely responsible for the red or yellow tint given to some skin or hair colors. Neuromelanin is found in the brain.