BF Antibody (Center)
Purified Rabbit Polyclonal Antibody (Pab)
- SPECIFICATION
- CITATIONS
- PROTOCOLS
- BACKGROUND
Application ![]()
| IHC-P, WB, E |
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Primary Accession | P00751 |
Reactivity | Human |
Host | Rabbit |
Clonality | Polyclonal |
Isotype | Rabbit IgG |
Calculated MW | 85533 Da |
Antigen Region | 395-422 aa |
Gene ID | 629 |
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Other Names | Complement factor B, C3/C5 convertase, Glycine-rich beta glycoprotein, GBG, PBF2, Properdin factor B, Complement factor B Ba fragment, Complement factor B Bb fragment, CFB, BF, BFD |
Target/Specificity | This BF antibody is generated from rabbits immunized with a KLH conjugated synthetic peptide between 395-422 amino acids from the Central region of human BF. |
Dilution | IHC-P~~1:50~100 WB~~1:1000 E~~Use at an assay dependent concentration. |
Format | Purified polyclonal antibody supplied in PBS with 0.09% (W/V) sodium azide. This antibody is prepared by Saturated Ammonium Sulfate (SAS) precipitation followed by dialysis against PBS. |
Storage | Maintain refrigerated at 2-8°C for up to 2 weeks. For long term storage store at -20°C in small aliquots to prevent freeze-thaw cycles. |
Precautions | BF Antibody (Center) is for research use only and not for use in diagnostic or therapeutic procedures. |
Name | CFB (HGNC:1037) |
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Synonyms | BF, BFD |
Function | Precursor of the catalytic component of the C3 and C5 convertase complexes of the alternative pathway of the complement system, a cascade of proteins that leads to phagocytosis and breakdown of pathogens and signaling that strengthens the adaptive immune system (PubMed:3638964, PubMed:624565, PubMed:6554279, PubMed:6919543, PubMed:9748277). The alternative complement pathway acts as an amplification loop that enhances other complement pathways (classical, lectin and GZMK) by promoting formation of additional C3 and C5 convertases (PubMed:3638964, PubMed:624565, PubMed:6554279, PubMed:6919543, PubMed:9748277). CFB is cleaved and activated by CFD to generate Ba and Bb chains; Bb chain constituting the catalytic component of the C3 and C5 convertases (PubMed:6769474, PubMed:9748277). |
Cellular Location | Secreted. |

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Provided below are standard protocols that you may find useful for product applications.
Background
BF is complement factor B, a component of the alternative pathway of complement activation. Factor B circulates in the blood as a single chain polypeptide. Upon activation of the alternative pathway, it is cleaved by complement factor D yielding the noncatalytic chain Ba and the catalytic subunit Bb. The active subunit Bb is a serine protease which associates with C3b to form the alternative pathway C3 convertase. Bb is involved in the proliferation of preactivated B lymphocytes, while Ba inhibits their proliferation.
References
Baatz,H., Klin Monatsbl Augenheilkd 226 (8), 654-658 (2009)
Goring,K., Am. J. Physiol., Cell Physiol. 296 (5), C1140-C1150 (2009)

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