The green or gold leaf hostas including the variegated forms of these colored leaf perennials are a slugs idea of smorgasbord delights. The waxy coated leaves of this blue hosta are plants that slugs donât like to eat.
Skin pigmentation. Melanin, whose primary function is in pigmentation, has many more important functions to perform in the human body. Protection from UV radiation. Melanin functions as a sunscreen and as a broad spectrum sun radiation absorbent. The absorbed energy causes redox reactions, and both eumelanin and pheomelanin form free radical species. Eumelanin, being more photostable scavenges the originated oxidative species and neutralizes them.
The pigment is produced in a specialized group of cells known as melanocytes. There are three basic types of melanin: eumelanin, pheomelanin, and neuromelanin. The most common type of melanin is eumelanin. There are two types of eumelaninâbrown eumelanin and black eumelanin.Pheomelanin is a cysteine-containing red polymer of benzothiazine units largely responsible for red hair, among other pigmentation.Neuromelanin is found in the brain, though its function remains obscure.he most common type of melanin is eumelanin. There are two types of eumelaninâbrown eumelanin and black eumelanin. Pheomelanin is a cysteine-containing red polymer of benzothiazine units largely responsible for red hair, among other pigmentation. Neuromelanin is found in the brain, though its function remains obscure.