GRP94 / HSP90B1 (Endoplasmic Reticulum Marker) [HSP90B1/1192]



Recognizes a protein of 94kDa, which is identified as the glucose-regulated protein 94 (grp94) and also tumor rejection antigen (gp96). Grp94 shows a high degree of sequence homology with the heat shock protein 90 (hsp90). This MAb is highly specific to grp94 and shows minimal cross-reaction with other members of the HSP90 family. Grp's are a class of proteins unresponsive to heat shock and are induced by glucose deprivation. Grp94 has been briefly studied as a prognostic factor in breast cancer.

Product Properties & Targets

Species Reactivity
Research Areas
Cellular Localization
Endoplasmic reticulum lumen, Melanosome, Sarcoplasmic reticulum lumen
Light Chain
Gene Name
Positive Control
U20S cells. Breast Carcinoma.
Recombinant full-length human HSP90B1 protein
Alternate Names
Endoplasmin, 94 kDa glucose-regulated protein, Heat shock protein 90 kDa beta member 1, Tumor rejection antigen 1, gp96 homolog, Glucose Regulated Protein 94; 94kDa glucose-regulated protein, Endoplasmin, Endothelial cell (HBMEC) glycoprotein (ECGP), Heat shock protein 90kDa beta member 1 (HSP90B1), Stress inducible tumor rejection antigen GP96, TRA1, Tumor rejection antigen-1 (gp96)

Database Links

Entrez Gene ID

Additional Information

Human Gene Symbol
Chromosome Location
Mol. Weight of Antigen


  • Molecular chaperone that functions in the processing and transport of secreted proteins (By similarity). When associated with CNPY3, required for proper folding of Toll-like receptors (By similarity). Functions in endoplasmic reticulum associated degradation (ERAD) (PubMed:18264092). Has ATPase activity (By similarity). May participate in the unfolding of cytosolic leaderless cargos (lacking the secretion signal sequence) such as the interleukin 1/IL-1 to facilitate their translocation into the ERGIC (endoplasmic reticulum-Golgi intermediate compartment) and secretion; the translocation process is mediated by the cargo receptor TMED10 (PubMed:32272059).

Known Applications & Suggested Dilutions

  • Immunohistochemistry (Formalin-fixed) (1-2ug/ml for 30 minutes at RT)(Staining of formalin-fixed tissues requires heating tissue sections in 10mM Tris with 1mM EDTA, pH 9.0, for 45 min at 95&degC followed by cooling at RT for 20 minutes)
  • Optimal dilution for a specific application should be determined.

Key References

  • Sorger, P.K. et al. J. Mol. Biol. 194: 341-344 (1987).
  • Tandon, A.K. Breast Cancer Res. and Treat. 16: 146 (1990).

Storage & Stability

Antibody with azide - store at 2 to 8°C. Antibody without azide - store at -20 to -80°C. Antibody is stable for 24 months. Non-hazardous. No MSDS required.


This antibody is available for research use only and is not approved for use in diagnosis.

Supplied as

200ug/ml of Ab Purified from Bioreactor Concentrate by Protein A/G. Prepared in 10mM PBS with 0.05% BSA & 0.05% azide. Also available WITHOUT BSA at 1.0mg/ml.


There are no warranties, expressed or implied, which extend beyond this description. Company is not liable for any personal injury or economic loss resulting from this product.


There are no reviews yet.

Be the first to review “GRP94 / HSP90B1 (Endoplasmic Reticulum Marker)”

Your email address will not be published. Required fields are marked *

Recombinant mouse monoclonal antibodies and recombinant rabbit monoclonals to support your research

Shop Primary Antibodies