Histopathological Findings of a Melanocytic Nevus A melanocytic nevus is a benign proliferation of melanocytes. Under the microscope, typical features include: Nests or clusters of uniform melanocytes located at the dermoepidermal junction, Extracellular matrix protein N glycosylation mediates immune self tolerance in Drosophila melanogaster PNAS Schematic representation of insects' immune effector mechanisms. (A) Download Scientific Diagram Drosophila are hosts to the first described parasitoid wasp of adult flies Nature