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
Supplied in a saline solution containing BSA and Sodium Azide.
10 µL/106 cells
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.
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 SIRP alpha /CD172a Fluorescein‑conjugated Monoclonal Antibody (Catalog # FAB4546F, filled histogram) or isotype control antibody (Catalog # IC0041F, open histogram). View our protocol for Staining Membrane-associated Proteins.
Preparation and Storage
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Protect from light. Do not freeze.
12 months from date of receipt, 2 to 8 °C as supplied.
Background: SIRP alpha/CD172a
SIRP alpha (Signal Regulatory Protein alpha), also known as CD172a, 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 presynaptic 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.
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