1. Recombinant Proteins
  2. CD Antigens Receptor Proteins
  3. Dendritic Cell CD Proteins Cell Adhesion Molecules (CAMs)
  4. SIRP alpha/CD172a Immunoglobulin-like Cell Adhesion Molecules
  5. Signal Regulatory Protein α
  6. SIRP alpha/CD172a Protein, Human (HEK293, Fc)

SIRP alpha/CD172a Protein, Human (HEK293, Fc)

Cat. No.: HY-P7406
COA Handling Instructions

Accession#P78324-1 CD172a (E31-R370);C-hFc

For research use only. We do not sell to patients.

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10 μg $89 In-stock
50 μg $250 In-stock
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Top Publications Citing Use of Products
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Accession#P78324-1 CD172a (E31-R370);C-hFc


Signal regulatory protein α (SIRPα) is a glycoprotein receptor that recruits and signals via the tyrosine phosphatases SHP-1 and SHP-2.The cytoplasmic domain of SIRPα contains four immunoreceptor tyrosine-based inhibition motifs (ITIMs), which upon phosphorylation recruit and activate SH2-domain-containing phosphotyrosine phosphatases (PTPase) SHP-1 and SHP-2. In macrophages SIRPα can negatively regulate the phagocytosis of host cells and the production of tumor necrosis factor alpha. SIRPα ligation induces macrophage NO production through the cooperative action of JAK/STAT and PI3-K/Rac1/NOX/H2O2 signaling pathways. It proposes that SIRPα may function as an inhibitory receptor[1].

Biological Activity

Immobilized CD47, His, Human at 2.0 μg/mL (100 µl/well), can bind SIRPα, hFc, Human with a linear range of 0.25-185.0 ng/mL.








P78324-1 (E31-R370)

Gene ID
Molecular Construction
rHuSignal regulatory protein α, Fc Chimera; CD172a; SHPS-1; BIT; MYD1
AA Sequence


Molecular Weight

85-100 kDa


Greater than 95% as determined by reducing SDS-PAGE.


Lyophilized powder


Lyophilized from a 0.2 μm filtered solution of PBS or PBS, 5% trehalose and mannitol.

Endotoxin Level

<1 EU/μg, determined by LAL method.


It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Storage & Stability

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.


Room temperature in continental US; may vary elsewhere.

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

  • Reconstitution Calculator

  • Dilution Calculator

  • Specific Activity Calculator

The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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SIRP alpha/CD172a Protein, Human (HEK293, Fc)
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