
1) Biological pigment
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https://www.crosswordclues.com/clue/neuromelanin

Neuromelanin (NM) is a dark pigment found in the brain which is structurally related to melanin. It is a polymer of 5,6-dihydroxyindole monomers. Neuromelanin is expressed in large quantities by the dopaminergic cells of the substantia nigra, and is thought to contribute to the dark color of that structure. ==Importance in humans== Neuromelanin is...
Found on
http://en.wikipedia.org/wiki/Neuromelanin

A modified form of melanin pigment normally found in certain neurons of the nervous system, especially in the substantia nigra and locus ceruleus. ... (05 Mar 2000) ...
Found on
http://www.encyclo.co.uk/local/20973

Type: Term Pronunciation: nū′rō-mel′ă-nin Definitions: 1. A modified form of melanin pigment normally found in certain neurons of the nervous system, especially in the substantia nigra and locus ceruleus.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=60125
No exact match found.