H3K27me3 (trimethylation at lysine 27 of histone H3) is involved in the modification of DNA by protein Histone H3. Complete loss of H3K27me3 expression by immunohistochemistry can be useful in the diagnosis of malignant peripheral nerve sheath tumors (MPNST).
Staining pattern: Nuclear
A formalin-fixed, paraffin-embedded (FFPE) tissue block is preferred specimen type
One (1) unbaked, unstained slide for H&E staining (required) and two to three (2-3) positively charged unstained slides (all cut at 4-5 microns) for each test/antibody ordered
Note: Block and slide identifiers should be clearly written and match exactly with the specimen ID and specimen labeling as noted on the requisition.
Use cold pack for transport. Make sure cold pack is not in direct contact with specimen.