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Unna-Pappenheim stain

Pronunciation: un'ah pahp'en-him

Definition: a contrast stain consisting of a methyl green-pyronin solution; originally used for gonococci, but later used to detect RNA and DNA in tissue sections; RNA is stained red and DNA appears green; used to demonstrate plasma cells during chronic inflammation.

See: methyl green-pyronin stain

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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