melanosome

melanosome
Membrane-bounded organelle found in melanocytes; when melanin synthesis is active internal structure is characteristic, containing melanofilaments that have a periodicity of around 9nm and are arranged in parallel arrays. Mature melanosomes, in which the filamentous structure is masked by the dense accumulation of melanin, are transferred to keratinocytes in the skin. Also found in pigmented retinal epithelium and in some cells of the connective tissue.

Dictionary of molecular biology. 2004.

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  • Melanosome — Mélanosome Le mélanosome est un membre de la famille des organelles intracellulaires, parent des lysosomes et des granules des plaquettes sanguines, à l intérieur duquel sont fabriquées les mélanines, pigments protégeant la peau des radiations… …   Wikipédia en Français

  • melanosome — melanosome. См. меланосома. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • melanosome — [mel′ə nō sōm΄, mə lan′əsōm] n. an organelle of a cell containing densely packed melanin pigments along rows of tiny fibers …   English World dictionary

  • Melanosome — For the geological term, see melanosome (geology). In a biological cell, a melanosome is an organelle containing melanin, the most common light absorbing pigment found in the animal kingdom. Cells that synthesize melanins are called melanocytes,… …   Wikipedia

  • Mélanosome — Le mélanosome est un organite intracellulaire, parent des lysosomes et des granules des plaquettes sanguines, à l intérieur duquel sont fabriquées les mélanines, pigments protégeant la peau des radiations solaires dans le règne animal. Il est… …   Wikipédia en Français

  • Melanosome (geology) — A melanosome in geology refers to the dark, mafic mineral bands formed in migmatite which is undergoing eutaxitic melting; probably to form granite. These form bands with leucosomes and such a texture may be described as schlieren or migmatitic.… …   Wikipedia

  • melanosome — noun Date: 1940 a melanin producing granule in a melanocyte …   New Collegiate Dictionary

  • melanosome — /meuh lan euh sohm , mel euh neuh /, n. Cell Biol. an organelle in melanocytes that synthesizes and stores melanin. [1935 40; MELANO + SOME3] * * * …   Universalium

  • melanosome — noun Any organelle that contains melanin …   Wiktionary

  • melanosome — The generally oval pigment granule (0.2 by 0.6 μm) produced by melanocytes. SYN: eumelanosome. [melano + G. soma, body] giant m. a large spherical m. (1 to 6 μ in diameter) formed in the cytoplasm of melanocytes in café au lait spots and other… …   Medical dictionary

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