Once made, melanin is moved along arm-like structures called dendrites in a special container called a melanosome, which is shipped to the keratinocytes. Melanosomes are vesicles or packages of the chemical inside a plasma membrane. The melanin is in organelles called “melanosomes”, which are organized as a cap protecting the nucleus of the keratinocyte.
When ultraviolet rays penetrate the skin and damage DNA, thymidine dinucleotide (pTpT) fragments from damaged DNA will trigger melanogenesis and cause the melanocyte to produce melanosomes, which are then transferred by dendrite to the top layer of keratinocytes. (from wikipedia)Other similar posts