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Your Position: Home > All Other Proteins > BAFF > BAF-H5261

Human BAFF / TNFSF13B / CD257 Protein, Fc Tag, active trimer (MALS verified)

  • Synonym
    TNFSF13B,BAFF,BLYS,CD257,DTL,TALL1,THANK,TNFSF20,ZTNF4,TALL-1
  • Source
    Human BAFF, Fc Tag, active trimer (BAF-H5261) is expressed from human 293 cells (HEK293). It contains AA Glu 140 - Leu 285 (Accession # Q9Y275-1) trimer Design.
    Predicted N-terminus: Pro
  • Molecular Characterization

    This protein carries a human IgG1 Fc tag at the N-terminus.

    The protein has a calculated MW of 76.7 kDa. The protein migrates as 120-140 kDa under non-reducing (NR) condition (SDS-PAGE) due to glycosylation.

  • Endotoxin
    Less than 1.0 EU per μg by the LAL method.
  • Purity

    >95% as determined by SDS-PAGE.

    >90% as determined by SEC-MALS.

  • Formulation

    Lyophilized from 0.22 μm filtered solution in 50 mM Tris, 100 mM Glycine, 150 mM NaCl, pH7.5. Normally trehalose is added as protectant before lyophilization.

    Contact us for customized product form or formulation.

  • Reconstitution

    Please see Certificate of Analysis for specific instructions.

    For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.

  • Storage

    For long term storage, the product should be stored at lyophilized state at -20°C or lower.

    Please avoid repeated freeze-thaw cycles.

    This product is stable after storage at:

    1. -20°C to -70°C for 12 months in lyophilized state;
    2. -70°C for 3 months under sterile conditions after reconstitution.
SDS-PAGE
Human BAFF, Fc Tag, active trimer (Cat. No. BAF-H5261) SDS-PAGE gel

Human BAFF, Fc Tag, active trimer on SDS-PAGE under non-reducing (NR) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.

SEC-MALS
Human BAFF, Fc Tag, active trimer (Cat. No. ) MALS images

The purity of Human BAFF, Fc Tag, active trimer (Cat. No. BAF-H5261) was more than 90% and the molecular weight of this protein is around 150-170 kDa verified by SEC-MALS.

Bioactivity-ELISA
Human BAFF, Fc Tag, active trimerHuman BAFF, Fc Tag, active trimer (Cat. No. BAF-H5261) ELISA bioactivity

Immobilized Human BCMA, Mouse IgG2a Fc Tag, low endotoxin (Cat. No. BCA-H5253) at 1 μg/mL (100 μL/well) can bind Human BAFF, Fc Tag, active trimer (Cat. No. BAF-H5261) with a linear range of 0.2-6 ng/mL (QC tested).

Human BAFF, Fc Tag, active trimerHuman BAFF, Fc Tag, active trimer (Cat. No. BAF-H5261) ELISA bioactivity

Immobilized Human BAFF, Fc Tag, active trimer (Cat. No. BAF-H5261) at 1 μg/mL (100 μL/well) can bind Biotinylated Human TACI, Fc,Avitag (Cat. No. TAI-H82F6) with a linear range of 0.002-0.05 μg/mL (Routinely tested).

Human BAFF, Fc Tag, active trimerHuman BAFF, Fc Tag, active trimer (Cat. No. BAF-H5261) ELISA bioactivity

Immobilized Human BAFF, Fc Tag, active trimer (Cat. No. BAF-H5261) at 1 μg/mL (100 μL/well) can bind Biotinylated Mouse BAFFR, Fc,Avitag (Cat. No. BAR-M82F0) with a linear range of 0.4-25 ng/mL (Routinely tested).

Bioactivity-SPR
Human_FcRn_Heterodimer_Protein_SPR

Immobilized Human BAFF, Fc Tag, active trimer (Cat. No. BAF-H5261) on CM5 Chip can bind Human TACI/TNFRSF13B, Fc Tag (Cat. No. TAI-H5256) with an affinity constant of 0.658 nM as determined in a SPR assay (Biacore T200) (Routinely tested).

Human_FcRn_Heterodimer_Protein_SPR

Immobilized Human BAFF, Fc Tag, active trimer (Cat. No. BAF-H5261) captured on CM5 chip via Anti-human IgG Fc antibodies surface can bind Human BAFFR, Llama IgG2b Fc Tag, low endotoxin (Cat. No. BAR-H5258) with an affinity constant of 44.5 nM as determined in a SPR assay (Biacore T200) (Routinely tested).

Bioactivity-BLI
Human_FcRn_Heterodimer_Protein_Bli

Loaded Human BAFF, Fc Tag, active trimer (Cat. No. BAF-H5261) on Protein A Biosensor, can bind Biotinylated Human BCMA, His,Avitag (Cat. No. BCA-H82E4) with an affinity constant of 0.69 μM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).

Bioactivity-Cell based assay
Human FcRn Heterodimer Protein Cell_Base

Human BAFF, Fc Tag, active trimer (Cat. No. BAF-H5261) stimulates proliferation of mouse spleen cells. The EC50 for this effect is 4.91-9.81 ng/mL (Routinely tested).

  • Background
    B-cell activating factor (BAFF) is also known as tumor necrosis factor ligand superfamily member 13B , TNFSF13B, BAFF, B Lymphocyte Stimulator (BLyS) , cluster of differentiation 257 (CD257), DTL, TNF- and APOL-related leukocyte expressed ligand (TALL-1), THANK, TNFSF20, ZTNF4, and is a cytokine that belongs to the tumor necrosis factor (TNF) ligand family. This cytokine is a ligand for receptors TNFRSF13B/TACI, TNFRSF17/BCMA, and TNFRSF13C/BAFFR. This cytokine is expressed in B cell lineage cells, and acts as a potent B cell activator. It has been also shown to play an important role in the proliferation and differentiation of B cells. It is expressed as transmembrane protein on various cell types including monocytes, dendritic cells and bone marrow stromal cells. BAFF is the natural ligand of three unusual tumor necrosis factor receptors named BAFF-R, TACI, and BCMA, all of which have differing binding affinities for it. These receptors are expressed mainly on mature B lymphocytes (TACI is also found on a subset of T-cells and BCMA on plasma cells). TACI binds worst since its affinity is higher for a protein similar to BAFF, called a proliferation-inducing ligand (APRIL). BCMA displays an intermediate binding phenotype and will work with either BAFF or APRIL to varying degrees. Signaling through BAFF-R and BCMA stimulates B lymphocytes to undergo proliferation and to counter apoptosis. All these ligands act as heterotrimers (i.e. three of the same molecule) interacting with heterotrimeric receptors, although BAFF has been known to be active as either a hetero- or homotrimer. BAFF acts as a potent B cell activator and has been shown to play an important role in the proliferation and differentiation of B cells. 
  • References
  • Please contact us via TechSupport@acrobiosystems.com if you have any question on this product.

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