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Your Position: Home > Immune Checkpoint Proteins > CD28 > CD8-M52H6

Mouse CD28 Protein, His Tag, active dimer (MALS verified)

  • Synonym
    CD28,Tp44
  • Source
    Mouse CD28, His Tag (CD8-M52H6) is expressed from human 293 cells (HEK293). It contains AA Asn 20 - Lys 149 (Accession # P31041-1).
    Predicted N-terminus: Asn 20
  • Molecular Characterization
    Online(Asn 20 - Lys 149) P31041-1

    This protein carries a polyhistidine tag at the C-terminus.

    The protein has a calculated MW of 16.9 kDa. As a result of glycosylation, the protein migrates as 33-40 kDa under reducing (R) condition, and 55-66 kDa under non-reducing (NR) condition (SDS-PAGE).

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

    >90% as determined by SDS-PAGE.

    >90% as determined by SEC-MALS.

  • Formulation

    Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. 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
Mouse CD28, His Tag (Cat. No. CD8-M52H6) SDS-PAGE gel

Mouse CD28, His Tag on SDS-PAGE under reducing (R) and non-reducing (NR) conditions. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 90%.

SEC-MALS
Mouse CD28, His Tag (Cat. No. ) MALS images

The purity of Mouse CD28, His Tag (Cat. No. CD8-M52H6) was more than 90% and the molecular weight of this protein is around 55-65 kDa verified by SEC-MALS.

Bioactivity-ELISA
Mouse CD28, His TagMouse CD28, His Tag (Cat. No. CD8-M52H6) ELISA bioactivity

Immobilized Mouse CD28, His Tag (Cat. No. CD8-M52H6) at 5 μg/mL (100 μL/well) on THE™ His Tag Antibody (Mouse) (0.1 μg/well) plate can bind Mouse B7-1, Fc Tag (Cat. No. CD0-M5259) with a linear range of 0.04-1 μg/ml (QC tested).

Bioactivity-SPR
Human_FcRn_Heterodimer_Protein_SPR

Mouse B7-1, Fc Tag (Cat. No. CD0-M5259) captured on CM5 chip via anti-human IgG Fc antibody can bind Mouse CD28, His Tag (Cat. No. CD8-M52H6) with an affinity constant of 49.6 nM as determined in a SPR assay (Biacore 8K) (Routinely tested).

Bioactivity-BLI
Human_FcRn_Heterodimer_Protein_Bli

Loaded Mouse B7-1, Fc Tag (Cat. No. CD0-M5259) on Protein A Biosensor, can bind Mouse CD28, His Tag (Cat. No. CD8-M52H6) with an affinity constant of 4.7 μM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).

  • Background
    T-cell-specific surface glycoprotein CD28 is also known as TP44, is a single-pass type I membrane protein which contains one Ig-like V-type (immunoglobulin-like) domain. is one of the molecules expressed on T cells that provide co-stimulatory signals, which are required for T cell activation. CD28 is the receptor for CD80 (B7.1) and CD86 (B7.2). When activated by Toll-like receptor ligands, the CD80 expression is upregulated in antigen presenting cells (APCs). The CD86 expression on antigen presenting cells is constitutive. CD28 is the only B7 receptor constitutively expressed on naive T cells.
  • Clinical and Translational Updates
      
  • Please contact us via TechSupport@acrobiosystems.com if you have any question on this product.

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