• Nature

  • Source

    HEK 293 cells
  • Amino Acid Sequence
    • Accession
    • Species

    • Sequence

    • Molecular weight

      17 kDa
    • Amino acids

      77 to 233


Our Abpromise guarantee covers the use of ab155699 in the following tested applications.

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

  • Biological activity

    Bioactivity is measured by its binding ability in a functional ELISA.

    Immobilized ab155699 at 5 μg/mL ( 100 μl/well ) can bind Humira with a linear range of 0.04-0.6 ng/mL.

  • Applications


    Functional Studies


  • Endotoxin level

    < 0.100 Eu/µg
  • Purity

    > 95 % SDS-PAGE.
    >95% SEC-HPLC
  • Form

  • Additional notes

    Endotoxin levels determined by the LAL method.

  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped at 4°C. Store at 4°C (stable for up to 12 months). Upon delivery aliquot. Store at -20°C or -80°C. Avoid freeze / thaw cycle. For long term storage it is recommended to add a carrier protein on reconstitution (0.1% HSA or BSA).

    pH: 7.40
    Constituents: PBS, 5% Trehalose

    Lyophilized from 0.22 µm filtered solution.

    This product is an active protein and may elicit a biological response in vivo, handle with caution.

  • Reconstitution
    It is recommended to reconstitute the lyophilized protein in 100 µl sterile deionized water to a final concentration of 1 mg/ml. Solubilize for 30 to 60 minutes at room temperature with occasional gentle mixing.

General Info

  • Alternative names

    • APC1
    • APC1 protein
    • Cachectin
    • DIF
    • Differentiation inducing factor
    • Macrophage cytotoxic factor
    • Tnf
    • TNF superfamily, member 2
    • TNF, macrophage derived
    • TNF, monocyte derived
    • TNF-a
    • TNF-alpha
    • TNFA
    • TNFSF2
    • Tumor necrosis factor
    • Tumor necrosis factor alpha
    • Tumor necrosis factor ligand superfamily member 2
    • Tumor Necrosis Factor, Membrane Form
    • Tumor necrosis factor, soluble form
    see all
  • Function

    Cytokine that binds to TNFRSF1A/TNFR1 and TNFRSF1B/TNFBR. It is mainly secreted by macrophages and can induce cell death of certain tumor cell lines. It is potent pyrogen causing fever by direct action or by stimulation of interleukin-1 secretion and is implicated in the induction of cachexia, Under certain conditions it can stimulate cell proliferation and induce cell differentiation.
  • Involvement in disease

    Genetic variations in TNF are a cause of susceptibility psoriatic arthritis (PSORAS) [MIM:607507]. PSORAS is an inflammatory, seronegative arthritis associated with psoriasis. It is a heterogeneous disorder ranging from a mild, non-destructive disease to a severe, progressive, erosive arthropathy. Five types of psoriatic arthritis have been defined: asymmetrical oligoarthritis characterized by primary involvement of the small joints of the fingers or toes; asymmetrical arthritis which involves the joints of the extremities; symmetrical polyarthritis characterized by a rheumatoidlike pattern that can involve hands, wrists, ankles, and feet; arthritis mutilans, which is a rare but deforming and destructive condition; arthritis of the sacroiliac joints and spine (psoriatic spondylitis).
  • Sequence similarities

    Belongs to the tumor necrosis factor family.
  • Post-translational

    The soluble form derives from the membrane form by proteolytic processing.
    The membrane form, but not the soluble form, is phosphorylated on serine residues. Dephosphorylation of the membrane form occurs by binding to soluble TNFRSF1A/TNFR1.
    O-glycosylated; glycans contain galactose, N-acetylgalactosamine and N-acetylneuraminic acid.
  • Cellular localization

    Secreted and Cell membrane.
  • Information by UniProt


  • Immobilized ab155699 at 2 μg/mL (100 μL/well) binds Humira.

    Linear range: 0.2-2 ng/mL (QC tested).

  • Immobilized ab155699 at 2 μg/mL (100 μL/well) binds ab174046

    Linear range: 0.2-3 ng/mL (Routinely tested).

  • ab155699 induces cytotoxicity effect on the WEH1-13VAR cells in the presence of the metabolic inhibitor actinomycin D.

    The EC50 for this effect is 0.007-0.014 ng/ml (Routinely tested).

  • Neutralization assay shows that the cytotoxicity effect of ab155699 was inhibited by increasing concentration of Adalimumab.

    The concentration of ab155699 used is 1 ng/mL.

    The IC50 is 29 ng/mL (Routinely tested).

  • A SEC-HPLC analysis showing over 95% of ab155699 present as active trimers with a molecular mass of 54 kDa.

  • Humira (Adalimumab) captured on CM5 chip via anti-human IgG Fc antibodies surface, can bindab155699 with an affinity constant of 0.255 nM, as determined in a SPR assay (Biacore T200) (Routinely tested).

  • Reduced ab155699 on SDS-PAGE, stained overnight with Coomassie Blue.

    Purity of protein >95%

    The protein migrates as 17 kDa and 18 kDa under reducing conditions.


ab155699 has not yet been referenced specifically in any publications.

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