ArticlemicroPublication biology2025
Catecholamines Differ in Their Capacity to Form Melanin.
Article in microPublication biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
2 authors.
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Abstract
Upon oxidation, the catechol amino acid L-DOPA polymerizes spontaneously to form the insoluble pigment melanin. Related catechols are less prone to polymerization, however, and this correlates with function. Comparison of the oxidation products of these catechols reveals that L-DOPA, dopamine, norepinephrine and epinephrine form a red-colored "chrome" upon oxidation, but epinephrine and norepinephrine, which act as neurohormones and neurotransmitters, do not go on to form an insoluble melanin. N-acetyldopamine (NADA), which functions in cuticle hardening in insects, does not even cyclize to the "chrome," so the quinone remains available to crosslink cuticular proteins without obscuring coloration by other pigments. Thus, the side-chains of catecholamines affect reactivity as well as function.
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Registered trials
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