Which reagent is used to identify melanin or lipofuscin?

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Multiple Choice

Which reagent is used to identify melanin or lipofuscin?

Identifying pigments like melanin and lipofuscin in tissue sections relies on a chemical test that makes these pigments stand out with a distinct color. Schmorl's reagent is used for this purpose because it oxidizes these pigments to produce a brownish-black color, allowing their presence to be seen clearly under light microscopy. This makes it a practical way to confirm melanin or lipofuscin when routine stains don’t distinguish them well. By contrast, Von Kossa detects calcium salts, Hall's Fouchet solution targets bile pigments, and Osmium tetroxide fixes and stains lipids rather than identifying melanin or lipofuscin specifically.

Identifying pigments like melanin and lipofuscin in tissue sections relies on a chemical test that makes these pigments stand out with a distinct color. Schmorl's reagent is used for this purpose because it oxidizes these pigments to produce a brownish-black color, allowing their presence to be seen clearly under light microscopy. This makes it a practical way to confirm melanin or lipofuscin when routine stains don’t distinguish them well. By contrast, Von Kossa detects calcium salts, Hall's Fouchet solution targets bile pigments, and Osmium tetroxide fixes and stains lipids rather than identifying melanin or lipofuscin specifically.

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