| 释义 | brown stain
 brown stainA chocolate brown stain produced by fungus in the sapwood of some pine trees.Brown StainA popular term for any immunoperoxidase—special stain used to detect antigens (e.g., leukocyte common antigen, cytokeratin, S-100, etc.)—in tissues by linking monoclonal antibodies raised against the antigen of interest to an enzyme in the last of several antigen-antibody linking steps; if antigen X is present, the enzyme digests a colourless substrate into a brown pigmented product
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