CD19: Immunoperoxidase staining of normal, formalin-fixed, paraffin-embedded, mouse spleen showing defuse membrane staining of B cells.

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Photo credit: © World History Archive / Alamy / Afripics
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Keywords: -cells, 21st, animal, archival, archive, cd19, century, formalin-fixed, historical, history, immunoperoxidase, medicine, membrane, mouse, normal, paraffin, science, spleen, staining, testing