Melanin
Videos
Melanin is a family of biomolecules organized as oligomers or polymers, which among other functions provide the pigments of many organisms. Melanin pigments are produced in a specialized group of cell
Micrograph of melanin pigment (light refracting granular material—center of image) in a pigmented melanoma
Micrograph of the epidermis, with melanin labeled at left
Display of the presentation of the red pheomelanin pigment alongside the black eumelanin pigment in the hairs and skin of the paw pad of a tortoiseshell cat.
The biochemical composition of peptidomelanin
Eye color
Videos
Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye's iris and the frequency-dependence of the scattering of light by the turbid medium in the stroma of th
The irises of human eyes exhibit a wide spectrum of colours
A dark brown iris bordering on black
A light brown iris
A light brown iris with limbal ring