Western blot shows lysates of HeLa human cervical epithelial carcinoma cell line, K562 human chronic myelogenous leukemia cell line, C2C12 mouse myoblast cell line, and NRK rat normal kidney cell line. PVDF membrane was probed with 0.5 µg/mL of Mouse Anti-Human Calreticulin Monoclonal Antibody (Catalog # MAB38981) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF018). A specific band was detected for Calreticulin at approximately 55 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Calreticulin in Human Prostate.

Calreticulin was detected in formalin fixed paraffin-embedded sections of human prostate using Mouse Anti-Human Calreticulin Monoclonal Antibody (Catalog # MAB38981) at 15 µg/mL overnight at 4 °C. Before incubation with the primary antibody, tissue was subjected to heat-induced epitope retrieval using Antigen Retrieval Reagent-Basic (Catalog # CTS013). Tissue was stained using the Anti-Mouse HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS002) and counterstained with hematoxylin (blue). Specific staining was localized to plasma membrane and cytoplasm. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.

Detection of Calreticulin in HeLa Human Cell Line by Flow Cytometry.

HeLa human cervical epithelial carcinoma cell line was stained with Mouse Anti-Human Calreticulin Monoclonal Antibody (Catalog # MAB38981, filled histogram) or isotype control antibody (Catalog # MAB0041, open histogram), followed by Allophycocyanin-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # F0101B). To facilitate intracellular staining, cells were fixed with Flow Cytometry Fixation Buffer (Catalog # FC004) and permeabilized with Flow Cytometry Permeabilization/Wash Buffer I (Catalog # FC005). View our protocol for Staining Intracellular Molecules.

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Applications for Human/Mouse/Rat Calreticulin Antibody

Application

Recommended Usage

Immunohistochemistry

8-25 µg/mL
Sample: Formalin fixed paraffin-embedded sections of human prostate subjected to heat-induced epitope retrieval using Antigen Retrieval Reagent-Basic (Catalog # CTS013)

Intracellular Staining by Flow Cytometry

0.25 µg/10⁶ cells
Sample: HeLa human cervical epithelial carcinoma cell line fixed with Flow Cytometry Fixation Buffer (Catalog # FC004) and permeabilized with Flow Cytometry Permeabilization/Wash Buffer I (Catalog # FC005)

Knockout Validated

Calreticulin is specifically detected in HeLa human cervical epithelial carcinoma parental cell line but is not detectable in Calreticulin knockout HeLa cell line.

Western Blot

0.5 µg/mL
Sample: HeLa human cervical epithelial carcinoma cell line, K562 human chronic myelogenous leukemia cell line, C2C12 mouse myoblast cell line, and NRK rat normal kidney cell line

Formulation, Preparation, and Storage

Purification

Protein A or G purified from hybridoma culture supernatant

Reconstitution

Reconstitute at 0.5 mg/mL in sterile PBS. For liquid material, refer to CoA for concentration.

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.

12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: Calreticulin

Human Calreticulin is a 55‑60 kDa, 400 amino acid, variably glycosylated intra- and extracellular Ca⁺⁺-binding lectin that is ubiquitously expressed. It consists of three domains: a 180 aa N-terminal globular region, a 111 aa P-, or proline rich domain, and a 109 aa C-terminus. The 180 aa N-terminus (aa 18‑197) is termed Vasostatin. It is unclear if it is ever generated naturally via proteolytic processing. Vasostatin domain has many functions. It binds to RNA (aa 18‑27), has autocatalytic phosphorylase activity (aa 77‑197), binds to a KxFFKR motif on steroid hormone receptors, and serves as a lectin-type chaperone for ER-localized molecules. It also shows antiangiogenic activity, presumably by binding to laminin carbohydrates and blocking endothelial cell adhesion and proliferation. Human Calreticulin is 94% aa identical to mouse and rat Calreticulin.

Alternate Names

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

Entrez Gene IDs

811 (Human); 12317 (Mouse); 64202 (Rat)

Gene Symbol

CALR

UniProt

P27797 (Human)

Additional Calreticulin Products

Product Documents for Human/Mouse/Rat Calreticulin Antibody

Product Datasheets

Download Product Datasheets

COA

SDS

Download SDS

Product Specific Notices for Human/Mouse/Rat Calreticulin Antibody

For research use only

Citations
Reviews

Calculators
Flow Cytometry

Human/Mouse/Rat Calreticulin Antibody

R&D Systems, part of Bio-Techne | Catalog # MAB38981

Key Product Details

Validated by

Species Reactivity

Validated:

Cited:

Applications

Validated:

Cited:

Label

Antibody Source

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Product Specifications

Immunogen

Specificity

Clonality

Host

Isotype

Scientific Data Images for Human/Mouse/Rat Calreticulin Antibody

Detection of Human, Mouse, and Rat Calreticulin by Western Blot.