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GRP94 / HSP90B1 (Endoplasmic Reticulum Marker) Antibody [9G10.F8.2]

In Stock
Catalog Number Formulation Size Price
Purified Ab with BSA and Azide at 200ug/ml
Purified Ab with BSA and Azide at 200ug/ml
Purified Ab WITHOUT BSA at 1.0mg/ml
Flat Rate Domestic: $60 | Orders outside the US - Contact Us for Order Information | Ships next business day

Applications & Dilutions

Applications Tested Dillution Protocol Note
Flow Cytometry (Flow)
1-2ug/million cells
Immunofluorescence (IF)
Immunohistochemistry (IHC)
30 min 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°C followed by cooling at RT for 20 minutes
Western Blot (WB)


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

Antibody Type
Isotype / Light Chain
IgG2a / Kappa
Cellular Localization
Endoplasmic reticulum lumen, Melanosome, Sarcoplasmic reticulum lumen
Gene Name
Positive Control
HePG2, U20S cells. About 50% of breast tumors express grp94 protein.
Purified glucose regulated protein 94 (grp94) from chicken oviducts
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

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).

Key References

  • Sorger, P.K. et al. J. Mol. Biol. 194: 341-344 (1987).
  • Tandon, A.K. et.al. 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.


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