Recombinant Human Signal-regulatory protein beta-1 (SIRPB1), partial

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Code CSB-EP021335HU
Size US$306
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  • (Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.
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Product Details

Greater than 90% as determined by SDS-PAGE.
Target Names
Uniprot No.
Research Area
Signal transduction
Alternative Names
SIRPB1; Signal-regulatory protein beta-1; SIRP-beta-1; CD172 antigen-like family member B; CD antigen CD172b
Homo sapiens (Human)
Expression Region
Target Protein Sequence
Note: The complete sequence including tag sequence, target protein sequence and linker sequence could be provided upon request.
Mol. Weight
Protein Length
Tag Info
N-terminal 6xHis-tagged
Liquid or Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.
If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol.
Note: If you have any special requirement for the glycerol content, please remark when you place the order.
If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.
Troubleshooting and FAQs
Storage Condition
Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Shelf Life
The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Lead Time
3-7 business days
Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Datasheet & COA
Please contact us to get it.

The production of the recombinant Human SIRPB1 protein begins with the creation of the recombinant plasmid, which is synthesized by inserting the gene encoding the Human SIRPB1 protein (30-371aa) into a plasmid vector. The recombinant plasmid is introduced into e.coli cells. e.coli cells that can survive in the presence of a specific antibiotic are selected and then cultured under conditions conducive to the expression of the gene of interest. The protein is equipped with a N-terminal 6xHis tag. Following expression, the recombinant SIRPB1 protein is isolated and purified from the cell lysate using affinity purification. Denaturing SDS-PAGE is then employed to resolve the resulting recombinant Human SIRPB1 protein, demonstrating a purity exceeding 90%.

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Target Background

Immunoglobulin-like cell surface receptor involved in the negative regulation of receptor tyrosine kinase-coupled signaling processes. Participates also in the recruitment of tyrosine kinase SYK. Triggers activation of myeloid cells when associated with TYROBP.
Gene References into Functions
  1. SIRPB1 copy-number polymorphism was significantly associated with impulsive-disinhibited personality scores in a dose-dependent manner. PMID: 25039969
  2. SIRPbeta1 is a novel IFN-induced microglial receptor that supports clearance of neural debris and Abeta aggregates by stimulating phagocytosis. PMID: 19893026
  3. SIRP beta 1 is a disulfide-linked homodimer in leukocytes that regulates neutrophil transepithelial migration PMID: 16081415
  4. This protein has been found differentially expressed in the temporal lobe from patients with schizophrenia. PMID: 19034380
Subcellular Location
Cell membrane; Single-pass type I membrane protein.
Tissue Specificity
Detected in monocytes and dendritic cells.
Database Links

HGNC: 15928

OMIM: 603889

UniGene: Hs.664861

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