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HT Histotechnician

Category - Staining

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It is an acid dye that stains basic protamines and histones?

Fast green
Nile blue
Prussian blue
Methyl green

Explanation

Answer: A - Fast green
The acid dye that stains basic protamines and histones is Fast green. These basic groups of tissue have higher isoelectrical points than the pH of the staining solutions which enable them to stain with Fast green. All other proteins that have lower isoelectrical points will not be stained. The other choices are not used to stain basic protamines and histones.

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