methyl green-pyronin stain
meth·yl green-·py·ro·nin stain
a staining method useful for identification of plasma cells which are intensely pyroninophilic; a mixture of a green and a red dye that has the property of staining highly polymerized nucleic acid (DNA) green and low molecular weight nucleic acids (RNA) red. See: Unna-Pappenheim stain.
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