Human SIRP alpha /CD172a Antibody

Catalog # Availability Size / Price Qty
Human SIRP alpha /CD172a Antibody in Western Blot
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Product Details
Citations (1)
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Reviews (1)

Human SIRP alpha /CD172a Antibody Summary

Species Reactivity
Detects human SIRP alpha /CD172a in direct ELISAs and Western blots. In direct ELISAs, 50-100% cross-reactivity with recombinant human (rh) SIRP beta 1 and no cross-reactivity with rhSIRP beta 2 is observed. In Western blots, approximately 10% cross-reactivity with rhSIRP beta 1 and no cross-reactivity with rhSIRP beta 2 is observed.
Monoclonal Mouse IgG2B Clone # 602411
Protein A or G purified from hybridoma culture supernatant
Chinese hamster ovary cell line CHO-derived recombinant human SIRP alpha /CD172a
Gly27-Asn370 (predicted)
Accession # P78324
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.


Recommended Concentration
Western Blot
2 µg/mL
See below
Flow Cytometry
2.5 µg/106 cells
See below
Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.
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.

Data Examples

Western Blot Detection of Human SIRP alpha /CD172a by Western Blot. View Larger

Detection of Human SIRP alpha /CD172a by Western Blot. Western blot shows lysates of human granulocytes. PVDF Membrane was probed with 2 µg/mL of Mouse Anti-Human SIRPa/CD172a Monoclonal Antibody (Catalog # MAB4546) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF007). A specific band was detected for SIRPa/CD172a at approximately 70 kDa (as indicated). This experiment was conducted under non-reducing conditions and using Immunoblot Buffer Group 1.

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

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).

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

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.

Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Preparation and Storage

Sterile PBS to a final concentration of 0.5 mg/mL.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Size / Price
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: 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
Entrez Gene IDs
140885 (Human); 19261 (Mouse); 25528 (Rat); 101926317 (Cynomolgus Monkey)
Alternate Names
BIT; BITbrain-immunoglobulin-like molecule with tyrosine-based activation motifs; Brain Ig-like molecule with tyrosine-based activation motifs; CD172 antigen-like family member A; CD172a antigen; CD172a; Inhibitory receptor SHPS-1; Macrophage fusion receptor; MFR; MFRtyrosine phosphatase SHP substrate 1; MyD-1 antigen; MYD1; MYD-1; P84; protein tyrosine phosphatase, non-receptor type substrate 1; PTPNS1; SHP substrate 1; SHPS1; SHPS-1; SHPS1CD172A; signal-regulatory protein alpha; Signal-regulatory protein alpha-1; Signal-regulatory protein alpha-2; Signal-regulatory protein alpha-3; SIRP alpha; SIRPA; SIRPalpha; Sirp-alpha-1; SIRPalpha2; Sirp-alpha-2; Sirp-alpha-3; SIRPtyrosine-protein phosphatase non-receptor type substrate 1

Product Datasheets

Citation for Human SIRP alpha /CD172a Antibody

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citation: Showing 1 - 1

  1. TRIM2, a novel member of the antiviral family, limits New World arenavirus entry
    Authors: N Sarute, N Ibrahim, B Medegan Fa, M Lavanya, C Cuevas, S Stavrou, G Otkiran-Cl, H Tyynismaa, J Henao-Meji, SR Ross
    PLoS Biol., 2019;17(2):e3000137.
    Species: Human
    Sample Types: Whole Cells
    Applications: Flow Cytometry


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Human SIRP alpha /CD172a Antibody
By Anonymous on 04/29/2020
Application: WB Sample Tested: MACROPHAGE Species: Human