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Feulgen stain

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Feulgen stain

(Science: technique) a selective cytochemical reaction for dna in which sections or cells are first hydrolyzed with hydrochloric acid to produce apurinic acid and then are stained with schiffs reagent to produce magenta-stained nuclei; generally the concentration of dna in nucleoli and mitochondria is too low to permit detection by this stain

See: kastens fluorescent feulgen stain.