melanosome

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melanosome

[mə′lan·ə‚sōm]
(cell and molecular biology)
An organelle which contains melanin and in which tyrosinase activity is not demonstrable.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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On the other hand, the eumelanosome was not intact on white skin after sun exposure.20,22 A study in Tunisia enrolling participants with skin type III, brown hair, and sun-exposed skin showed moderate melasma based on MASI score (16-32.9).
Cigar-shaped eumelanosomes hold a black pigment called melanin, he notes, and egg-shaped or near-spherical phaeomelanosomes contain pigments ranging from reddish brown through yellow.