Human Calreticulin Antibody

Catalog #: MAB38982 Datasheet / COA / SDS

Catalog #	Availability	Size / Price	Qty
MAB38982-100
MAB38982-SP

Detection of Human Calreticulin by Western Blot.

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Summary Data Examples Preparation and Storage Reconstitution Calculator Background Product Datasheets Related Research Areas

Human Calreticulin Antibody Summary

Species Reactivity

Human

Specificity

Detects human Calreticulin in direct ELISAs. In direct ELISAs, no cross-reactivity with human Vasostatin is observed.

Source

Monoclonal Mouse IgG₁ Clone # 681207

Purification

Protein A or G purified from hybridoma culture supernatant

Immunogen

E. coli-derived recombinant human Calreticulin
Glu18-Leu417
Accession # P27797

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.

Label

Unconjugated

Applications

Recommended Concentration

Sample

Western Blot

1 µg/mL

See below

Immunohistochemistry

8-25 µg/mL

See below

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Scientific Data

Western Blot

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Detection of Human Calreticulin by Western Blot. Western blot shows lysates of HeLa human cervical epithelial carcinoma cell line, HepG2 human hepatocellular carcinoma cell line, K562 human chronic myelogenous leukemia cell line, and MOLT-4 human acute lymphoblastic leukemia cell line. PVDF membrane was probed with 1 µg/mL of Mouse Anti-Human Calreticulin Monoclonal Antibody (Catalog # MAB38982) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF018). A specific band was detected for Calreticulin at approximately 60 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Immunohistochemistry

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Calreticulin in Human Prostate. Calreticulin was detected in immersion fixed paraffin-embedded sections of human prostate using Mouse Anti-Human Calreticulin Monoclonal Antibody (Catalog # MAB38982) at 15 µg/mL for 1 hour at room temperature followed by incubation with the Anti-Mouse IgG VisUCyte™ HRP Polymer Antibody (Catalog # VC001). 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 DAB (brown) and counterstained with hematoxylin (blue). Specific staining was localized to cytoplasm. View our protocol for IHC Staining with VisUCyte HRP Polymer Detection Reagents.

Reconstitution Calculator

Preparation and Storage

Reconstitution

Reconstitute at 0.5 mg/mL in sterile PBS.

Shipping

The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C

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.

Entrez Gene IDs

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

Alternate Names

Autoantigen Ro; CALR; Calregulin; Calreticulin; cC1qR; CRP55; CRT; Endoplasmic reticulum resident protein 60; epididymis secretory sperm binding protein Li 99n; ERp60; FLJ26680; grp60; HACBP; HEL-S-99n; RO; Sicca syndrome antigen A (autoantigen Ro; calreticulin); SSA; Vasostatin