The formation of moles with ragged edges indicates a cancer of cells which produce this pigment.
A form of this substance that contains cysteine is made of benzothiazine and benzothiazole units. In the human body, the first step in the synthesis of this substance is the synthesis of dopaquinone from tyrosine, which is catalyzed by the enzyme tyrosinase. In Parkinson's disease, neurons that contain a form of this substance are lost in the substantia nigra, which is named for the appearance of those cells. In piebaldism and vitiligo, cells that produce this substance are unable to transport their products to keratinocytes. The formation of moles with ragged edges indicates a cancer of cells which produce this pigment. For 10 points, name this pigment which is produced in the skin in response to sunlight.
A form of this substance that contains cysteine is made of benzothiazine and benzothiazole units.
melanin