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Your Position: Home > Protein > BAFF > BAF-H82F3

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

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  • Synonym
    TNFSF13B,BAFF,BLYS,CD257,DTL,TALL1,THANK,TNFSF20,ZTNF4,TALL-1
  • Source
    Biotinylated Human BAFF Protein, Avitag,Fc Tag(BAF-H82F3) is expressed from human 293 cells (HEK293). It contains AA Ala 134 - Leu 285 (Accession # AAH20674.1).
    Predicted N-terminus: Gly
  • Molecular Characterization
    BAFF Structure

    This protein carries an Avi tag (Avitag™) at the N-terminus, followed by a human IgG1 Fc tag.

    The protein has a calculated MW of 44.9 kDa. The protein migrates as 50-55 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

  • Labeling
    Biotinylation of this product is performed using Avitag™ technology. Briefly, the single lysine residue in the Avitag is enzymatically labeled with biotin.
  • Protein Ratio
    Passed as determined by the HABA assay / binding ELISA.
  • Endotoxin
    Less than 1.0 EU per μg by the LAL method.
  • Purity

    >95% as determined by SDS-PAGE.

  • Formulation

    Lyophilized from 0.22 μm filtered solution in Tris with Glycine, Arginine and NaCl, pH7.5 with trehalose as protectant.

    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
BAFF SDS-PAGE

Biotinylated Human BAFF Protein, Avitag,Fc Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95%.

SEC-MALS
BAFF MALS images

The purity of Biotinylated Human BAFF Protein, Avitag,Fc Tag (Cat. No. BAF-H82F3) is more than 85% and the molecular weight of this protein is around 280-320 kDa verified by SEC-MALS.

Bioactivity-ELISA
 BAFF ELISA

Immobilized Human BCMA, Fc Tag (Cat. No. BC7-H5254) at 5 μg/mL (100 μL/well) can bind Biotinylated Human BAFF Protein, Avitag,Fc Tag (Cat. No. BAF-H82F3) with a linear range of 1.95-15.6 ng/mL (QC tested).

 BAFF ELISA

Immobilized Human TACI Protein, Fc Tag at 2 μg/mL (100 μL/well) can bind Biotinylated Human BAFF Protein, Avitag,Fc Tag (Cat. No. BAF-H82F3) with a linear range of 0.2-6 ng/mL (Routinely tested).

 BAFF ELISA

Serial dilutions of Anti-BAFFR Antibody, Human IgG1 were added into Human BAFFR Protein, Llama IgG2b Fc Tag (Cat. No. BAR-H5258): Biotinylated Human BAFF Protein, Avitag,Fc Tag (Cat. No. BAF-H82F3) binding reactions. The half maximal inhibitory concentration (IC50) is 0.8129 μg/mL (Routinely tested).

 BAFF ELISA

Serial dilutions of Anti-BAFFR Antibody, Human IgG1 were added into Human BAFFR, Fc Tag (Cat. No. BAR-H5257): Biotinylated Human BAFF Protein, Avitag,Fc Tag (Cat. No. BAF-H82F3) binding reactions. The half maximal inhibitory concentration (IC50) is 0.4692 μg/mL (Routinely tested).

Bioactivity-SPR
 BAFF SPR

Immobilized Biotinylated Human BAFF Protein, Avitag,Fc Tag (Cat. No. BAF-H82F3) on SA Chip can bind Human TACI Protein, Fc Tag with an affinity constant of 0.988 nM as determined in a SPR assay (Biacore T200) (Routinely tested).

 BAFF SPR

Immobilized Biotinylated Human BAFF Protein, Avitag,Fc Tag (Cat. No. BAF-H82F3) on SA Chip can bind Human BAFFR, Fc Tag (Cat. No. BAR-H5257) with an affinity constant of 26.7 nM as determined in a SPR assay (Biacore T200) (Routinely tested).

Bioactivity-BLI
 BAFF BLI

Loaded Biotinylated Human BAFF Protein, Avitag,Fc Tag (Cat. No. BAF-H82F3) on SA Biosensor, can bind Human BCMA, His Tag (Cat. No. BCA-H522y) with an affinity constant of 1 μM as determined in BLI assay (ForteBio Octet Red96e) (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. 
  • Clinical and Translational Updates

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