title: Electron microscopic study of human gingival melanin pigmentation.
mesh_terms: D000328:Adult; D005881:Gingiva / Q000166:cytology / Q000648:ultrastructure*; D006801:Humans; D008543:Melanins / Q000378:metabolism*; D008854:Microscopy, Electron; D010858:Pigmentation
chemical_list: D008543:Melanins