Recombinant Mouse Complement factor I(Cfi)

In Stock
Code CSB-MP005279MO
Size $7762
  • (Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.
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Product Details


The synthesis of this Recombinant Mouse Cfi protein depends on the utilization of recombinant DNA technology. DNA sequences that encoded the Cfi protein could be inserted into a vector and introduced into an expression host, Mammalian cell, where it could be easily expressed in and purified from. The expression of this Cfi protein was at 19-603aa. N-terminal 10xHis tag & C-terminal Myc tag was fused with this protein. The purity is 85%+ determined by SDS-PAGE.

Cfi (also known as If) is gene encoding a protein named complement factor I (Cfi or C3B/C4B inactivator). The protein encoded by this gene is a protein of the complement system, first isolated in 1966 in guinea pig serum. It is cleaved into three subcomponents by proteolytic cleavage, including C3b, iC3b and C4b. This protein mainly takes parts in two biological processes, complement activation signaling pathway and innate immune response with the scavenger receptor and serine-type endopeptidase activity.

Purity Greater than 85% as determined by SDS-PAGE.
Target Names Cfi
Uniprot No. Q61129
Research Area Epigenetics and Nuclear Signaling
Alternative Names
Cfi; IfComplement factor I; EC; C3B/C4B inactivator) [Cleaved into: Complement factor I heavy chain; Complement factor I light chain]
Species Mus musculus (Mouse)
Source Mammalian cell
Expression Region 19-603aa
Note: The complete sequence including tag sequence, target protein sequence and linker sequence could be provided upon request.
Mol. Weight 69.8 kDa
Protein Length Full Length of Mature Protein
Tag Info N-terminal 10xHis-tagged and C-terminal Myc-tagged
Form 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.
Buffer If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
Reconstitution 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.
and FAQs
Protein 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
Notes 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.

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Target Background

Trypsin-like serine protease that plays an essential role in regulating the immune response by controlling all complement pathways. Inhibits these pathways by cleaving three peptide bonds in the alpha-chain of C3b and two bonds in the alpha-chain of C4b thereby inactivating these proteins. Essential cofactors for these reactions include factor H and C4BP in the fluid phase and membrane cofactor protein/CD46 and CR1 on cell surfaces. The presence of these cofactors on healthy cells allows degradation of deposited C3b by CFI in order to prevent undesired complement activation, while in apoptotic cells or microbes, the absence of such cofactors leads to C3b-mediated complement activation and subsequent opsonization.
Gene References into Functions
  1. Factor I-mediated generation of activated C3 fragments in the circulation is a critical determinant for the development of MPGN2 associated with factor H deficiency. PMID: 18202746
Subcellular Location Secreted, extracellular space.
Protein Families Peptidase S1 family
Tissue Specificity Expressed in the liver by hepatocytes. Also present in other cells such as monocytes, fibroblasts or keratinocytes.
Database Links

KEGG: mmu:12630

STRING: 10090.ENSMUSP00000077074

UniGene: Mm.117180

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