Detects human SIRP alpha/CD172a in direct ELISAs and Western blots. In direct ELISAs, 50-100% cross-reactivity with recombinant human (rh) SIRP beta1 and no cross-reactivity with rhSIRP beta2 is observed. In Western blots, approximately 10% cross-reactivity with rhSIRP beta1 and no cross-reactivity with rhSIRP beta2 is observed.

Clonality

Monoclonal

Host

Mouse

Isotype

IgG_2B

Scientific Data Images for Human SIRP alpha/CD172a Antibody

Detection of Human SIRP alpha/CD172a
by Western Blot.

Western blot shows lysates of A549 human lung carcinoma cell line, U2OS human osteosarcoma cell line, U937 human histiocytic lymphoma cell line, and human granulocytes. PVDF membrane was probed with 2 µg/mL of Mouse Anti-Human SIRP alpha/CD172a
Monoclonal Antibody (Catalog # MAB4546) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF018). A specific band was detected for SIRP alpha/CD172a
at approximately 70-95 kDa (as indicated). This experiment was conducted under non-reducing conditions and using Western Blot Buffer Group 1.

Detection of SIRP alpha/CD172a in U937 Human Cell Line by Flow Cytometry.

U937 human histiocytic lymphoma cell line was stained with Mouse Anti-Human SIRPa/CD172a Monoclonal Antibody (Catalog # MAB4546, filled histogram) or isotype control antibody (Catalog # MAB0041, open histogram), followed by Allophycocyanin-conjugated Anti-Mouse IgG F(ab')₂Secondary Antibody (Catalog # F0101B).

SIRP alpha/CD172a in THP‑1 Human Cell Line.

SIRPa/CD172a was detected in immersion fixed THP-1 human acute monocytic leukemia cell line using Mouse Anti-Human SIRPa/CD172a Monoclonal Antibody (Catalog # MAB4546) at 10 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Mouse IgG Secondary Antibody (red; Catalog # NL007) and counterstained with DAPI. Specific staining was localized to cell membranes. View our protocol for Fluorescent ICC Staining of Non-adherent Cells.

Applications for Human SIRP alpha/CD172a Antibody

Application

Recommended Usage

CyTOF-ready

Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.

Flow Cytometry

2.5 µg/10⁶ cells
Sample: U937 human histiocytic lymphoma cell line

Immunocytochemistry

8-25 µg/mL
Sample: Immersion fixed THP‑1 human acute monocytic leukemia cell line

Western Blot

2 µg/mL
Sample: A549 human lung carcinoma cell line, U2OS human osteosarcoma cell line, U937 human histiocytic lymphoma cell line, and human granulocytes

Please Note: Optimal dilutions of this antibody should be experimentally determined.

Reviewed Applications

Read 3 reviews rated 4.3 using MAB4546 in the following applications:

Immunocytochemistry/Immunofluorescence (2 Reviews)
Western Blot (1 Review)

Formulation, Preparation, and Storage

Purification

Protein A or G purified from hybridoma culture supernatant

Reconstitution

Sterile PBS to a final concentration of 0.5 mg/mL. 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: SIRP alpha/CD172a

SIRP alpha (Signal regulatory protein alpha; also SHPS1 and BIT) is a variably glycosylated 90-120 kDa member of the SIRP family of proteins. It is widely expressed, being found on neurons, microglia/macrophages, endothelium, and fibroblasts. SIRP alpha has a variety of functions, including presynsptic organization, inhibition of integrin action, and induction of myogenesis. It binds to CD47 and likely other ligands. Mature human SIRP alpha is a 477 amino acid (aa) type I transmembrane glycoprotein. It contains an extracellular region (aa 27-372) that shows one V-type Ig-like (aa 32-137) and two C2-type Ig-like domains (aa 147-347). Its cytoplasmic domain possesses two ITIMs which interact with protein tyrosine phosphatases. There is one alternative start site at Met102 plus a four aa insertion after Gln421. Over aa 27-370, human SIRP alpha shares 61% aa identity with mouse SIRP alpha.

Long Name

Signal-regulatory Protein alpha

Alternate Names

BIT, CD172a, MFR, MYD-1, SHPS1, SIRPA

Entrez Gene IDs

140885 (Human); 19261 (Mouse); 25528 (Rat); 494566 (Porcine); 609452 (Canine); 101926317 (Cynomolgus Monkey)

Gene Symbol

SIRPA

UniProt

P78324

Additional SIRP alpha/CD172a Products

Product Documents for Human SIRP alpha/CD172a Antibody

Product Datasheets

Download Product Datasheets

COA

SDS

Download SDS

Product Specific Notices for Human SIRP alpha/CD172a Antibody

For research use only

Citations
Reviews

Calculators
Flow Cytometry

Human SIRP alpha/CD172a Antibody

R&D Systems, part of Bio-Techne | Catalog # MAB4546

Key Product Details

Species Reactivity

Validated:

Cited:

Applications