Key Product Details

Species Reactivity

Validated:

Human, Primate

Cited:

Human

Applications

Immunohistochemistry, Immunohistochemistry-Paraffin, Western Blot, Immunocytochemistry/ Immunofluorescence, Immunoprecipitation

Label

Unconjugated

Antibody Source

Monoclonal Mouse IgG1 Clone # FMC 75

Format

BSA Free
View all Calreticulin Primary Antibodies »

Product Specifications

Immunogen

Calreticulin Antibody (FMC 75) was developed against recombinant Calreticulin-maltose binding fusion protein.

Reactivity Notes

Recognizes Primate Calreticulin.

Marker

Endoplasmic Reticulum Marker

Clonality

Monoclonal

Host

Mouse

Isotype

IgG1

Theoretical MW

63 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

Scientific Data Images for Calreticulin Antibody (FMC 75) - BSA Free

Western Blot: Calreticulin Antibody (FMC 75) [NBP1-97502]

Western Blot: Calreticulin Antibody (FMC 75) [NBP1-97502]

Western Blot: Calreticulin Antibody (FMC 75) [NBP1-97502] - Analysis of Calreticulin: Lane 1: HeLa (Heat Shocked), Lane 2: Vero.
Immunohistochemistry-Paraffin: Calreticulin Antibody (FMC 75) [NBP1-97502]

Immunohistochemistry-Paraffin: Calreticulin Antibody (FMC 75) [NBP1-97502]

Immunohistochemistry-Paraffin: Calreticulin Antibody (FMC 75) [NBP1-97502] - Analysis of human uterus tissue stained with Calreticulin, mAb (FMC 75) at 10ug/ml.

Applications for Calreticulin Antibody (FMC 75) - BSA Free

Application
Recommended Usage

Immunocytochemistry/ Immunofluorescence

1:10-1:500

Immunohistochemistry

1:10-1:500

Immunohistochemistry-Paraffin

1:10-1:500

Immunoprecipitation

12.5 ug/ml

Western Blot

1:1000

Formulation, Preparation, and Storage

Purification

Protein G purified

Formulation

PBS and 50% Glycerol

Format

BSA Free

Preservative

0.09% Sodium Azide

Concentration

1.0 mg/ml

Shipping

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Store at -20C. Avoid freeze-thaw cycles.

Background: Calreticulin

Calreticulin, also called CALR, is an endoplasmic reticulum (ER) protein that functions as a calcium (Ca2+) buffering molecular chaperone (1-3). Together with calnexin and ERp57, calreticulin has a critical role in protein folding and quality control of newly synthesized glycoproteins (1-3). Calreticulin has many diverse functions beyond Ca2+ binding, including cell adhesion, lectin binding, apoptosis, nuclear transport, antigen presentation, and immune response (1-3). Specifically, calreticulin is part of the peptide-loading complex that resides on the ER membrane and is responsible for antigen loading onto MHC class I molecules (1-3). Calreticulin protein has a theoretical molecular weight of 46 kDa and is 417 amino acids (aa) in length (1-3). The protein has three main domains: the N-terminal lectin-like domain, the proline-rich P-domain, and the acidic C-domain which is followed by an ER-retention KDEL signal sequence (1-3).

Given its role in multiple biological processes, it makes sense that calreticulin is implicated in both healthy and disease states. Studies have found that calreticulin mutations were present in patients with myeloproliferative neoplasms (MFN) and essential thrombocythaemia (ET) (4). Calreticulin expression is typically upregulated in most cancer lines, however it is downregulated in some tissues including cervical carcinomas, prostate cancer, and human colon adenocarcinoma (3). High expression of calreticulin on cancer cells is related to tumor cell phagocytosis and is often correlated with, and counteracted by, elevated CD47 expression to prevent cancer cell phagocytosis (3). Calreticulin mutations can serve as a major diagnostic biomarker for MFN and ET and additionally the calreticulin gene may be a potential target for cancer therapeutics (3,4).

References

1. Michalak, M., Groenendyk, J., Szabo, E., Gold, L. I., & Opas, M. (2009). Calreticulin, a multi-process calcium-buffering chaperone of the endoplasmic reticulum. The Biochemical Journal. https://doi.org/10.1042/BJ20081847

2. Fucikova, J., Spisek, R., Kroemer, G., & Galluzzi, L. (2021). Calreticulin and cancer. Cell Research. https://doi.org/10.1038/s41422-020-0383-9

3. Sun, J., Mu, H., Dai, K., & Yi, L. (2017). Calreticulin: a potential anti-cancer therapeutic target. Die Pharmazie. https://doi.org/10.1691/ph.2017.7031

4. Prins, D., Gonzalez Arias, C., Klampfl, T., Grinfeld, J., & Green, A. R. (2020). Mutant Calreticulin in the Myeloproliferative Neoplasms. HemaSphere. https://doi.org/10.1097/HS9.0000000000000333

Alternate Names

Autoantigen Ro, CALR, Calregulin, cC1qR, CRT, SSA, Vasostatin

Gene Symbol

CALR

UniProt

P27797 (Human)

Additional Calreticulin Products

Product Documents for Calreticulin Antibody (FMC 75) - BSA Free

Certificate of Analysis

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Product Specific Notices for Calreticulin Antibody (FMC 75) - BSA Free

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

Citations for Calreticulin Antibody (FMC 75) - BSA Free

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Protocols

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