• Product nameAnti-Factor I antibody
    See all Factor I primary antibodies
  • Description
    Rabbit polyclonal to Factor I
  • Tested applicationsSuitable for: WBmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Synthetic peptide, corresponding to a region within N terminal amino acids 145-194 (WSMREANVAC LDLGFQQGAD TQRRFKLSDL SINSTECLHV HCRGLETSLA) of Human Factor I (NP_000195).

  • Positive control
    • HeLa cell lysate.


  • FormLiquid
  • Storage instructionsShipped at 4°C. Upon delivery aliquot and store at -20°C. Avoid repeated freeze / thaw cycles.
  • Storage bufferConstituents: 97% PBS, 2% Sucrose
  • Concentration information loading...
  • PurityImmunogen affinity purified
  • ClonalityPolyclonal
  • IsotypeIgG
  • Research areas

Associated products


Our Abpromise guarantee covers the use of ab125440 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
WB Use a concentration of 1 µg/ml. Predicted molecular weight: 66 kDa. Good results were obtained when blocked with 5% non-fat dry milk in 0.05% PBS-T.


  • FunctionResponsible for cleaving the alpha-chains of C4b and C3b in the presence of the cofactors C4-binding protein and factor H respectively.
  • Tissue specificityPlasma.
  • Involvement in diseaseDefects in CFI are a cause of susceptibility to hemolytic uremic syndrome atypical type 3 (AHUS3) [MIM:612923]. An atypical form of hemolytic uremic syndrome. It is a complex genetic disease characterized by microangiopathic hemolytic anemia, thrombocytopenia, renal failure and absence of episodes of enterocolitis and diarrhea. In contrast to typical hemolytic uremic syndrome, atypical forms have a poorer prognosis, with higher death rates and frequent progression to end-stage renal disease. Note=Susceptibility to the development of atypical hemolytic uremic syndrome can be conferred by mutations in various components of or regulatory factors in the complement cascade system. Other genes may play a role in modifying the phenotype.
    Defects in CFI are the cause of complement factor I deficiency (CFI deficiency) [MIM:610984]. CFI deficiency is an autosomal recessive condition associated with a propensity to pyogenic infections.
  • Sequence similaritiesBelongs to the peptidase S1 family.
    Contains 1 Kazal-like domain.
    Contains 2 LDL-receptor class A domains.
    Contains 1 peptidase S1 domain.
    Contains 1 SRCR domain.
  • Cellular localizationSecreted > extracellular space.
  • Information by UniProt
  • Database links
  • Alternative names
    • AHUS3 antibody
    • ARMD13 antibody
    • C3b INA antibody
    • C3b inactivator antibody
    • C3B/C4B inactivator antibody
    • C3BINA antibody
    • CFAI_HUMAN antibody
    • Cfi antibody
    • Complement component I antibody
    • Complement control protein factor I antibody
    • Complement factor I antibody
    • Complement factor I heavy chain antibody
    • Complement factor I light chain antibody
    • F1 antibody
    • factor I antibody
    • FactorI antibody
    • FI antibody
    • I factor antibody
    • IF antibody
    • KAF antibody
    • Konglutinogen activating factor antibody
    • Light chain of factor I antibody
    • OTTHUMP00000219728 antibody
    • OTTHUMP00000221928 antibody
    see all

Anti-Factor I antibody images

  • Anti-Factor I antibody (ab125440) at 1 µg/ml + HeLa cell lysate at 10 µg

    Predicted band size : 66 kDa

References for Anti-Factor I antibody (ab125440)

ab125440 has not yet been referenced specifically in any publications.

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