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Human B7-1/CD80 Biotinylated Antibody

R&D Systems, part of Bio-Techne | Catalog # BAF140

R&D Systems, part of Bio-Techne
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BAF140

Key Product Details

Species Reactivity

Human

Applications

Western Blot

Label

Biotin

Antibody Source

Polyclonal Goat IgG

Product Specifications

Immunogen

S. frugiperda insect ovarian cell line Sf 21-derived recombinant human B7-1
Extracellular domain

Specificity

Detects human B7-1 in Western blots. In this format, approximately 5% cross‑reactivity with recombinant human (rh) B7-2, rmB7-1, and rmB7-2 is observed.

Clonality

Polyclonal

Host

Goat

Isotype

IgG

Applications for Human B7-1/CD80 Biotinylated Antibody

Application
Recommended Usage

Western Blot

0.1 µg/mL
Sample: Recombinant Human B7-1/CD80 Fc Chimera (Catalog # 140-B1)

Formulation, Preparation, and Storage

Purification

Antigen Affinity-purified

Reconstitution

Reconstitute at 0.2 mg/mL in sterile PBS.

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Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.

Shipping

The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: B7-1/CD80

B7-1 and B7-2, together with their receptors CD28 and CTLA-4, constitute one of the dominant co-stimulatory pathways that regulate T- and B-cell responses. Although both CTLA-4 and CD28 can bind to the same ligands, CTLA-4 binds to B7-1 and B7-2 with a 20 - 100 fold higher affinity than CD28 and is involved in the down-regulation of the immune response. B7-1 is expressed on activated B cells, activated T cells, and macrophages. B7-2 is constitutively expressed on interdigitating dendritic cells, Langerhans cells, peripheral blood dendritic cells, memory B cells, and germinal center B cells. Additionally, B7-2 is expressed at low levels on monocytes and can be up-regulated through interferon gamma. B7-1 and B7-2 are both members of the Immunoglobulin superfamily. Human B7-1 is a 288 amino acid (aa) protein containing a 34 aa signal peptide, a 208 aa extracellular domain, a 21 aa transmembrane domain, and a 25 aa cytoplasmic domain. Human B7-1 and B7-2 share 26% amino acid identity. Human and mouse B7-1 share 44% amino acid identity. However, it has been observed that both human and mouse B7-1 and B7-2 can bind to either human or mouse CD28 and CTLA-4, suggesting that there are conserved amino acids which form theB7-1/B7-2/CD28/CTLA-4 critical binding sites.

References

  1. Azuma, M. et al. (1993) Nature 366:76.
  2. Freeman, G.J. et al. (1993) Science 262:909.
  3. Freeman, G. et al. (1991) J. Exp. Med. 174:625.
  4. Selvakumar, A. et al. (1993) Immunogenetics 38:292.
  5. Chen, C. et al. (1994) J. Immunol. 152:4929.
  6. Freeman, G.J. et al. (1993) J. Exp. Med. 178:2185.

Alternate Names

B71, CD80

Entrez Gene IDs

941 (Human); 12519 (Mouse); 25408 (Rat); 102140078 (Cynomolgus Monkey)

Gene Symbol

CD80

Additional B7-1/CD80 Products

Product Documents for Human B7-1/CD80 Biotinylated Antibody

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Note: Certificate of Analysis not available for kit components.

Product Specific Notices for Human B7-1/CD80 Biotinylated Antibody

For research use only

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