Human B7-1/CD80 Biotinylated Antibody

Catalog # Availability Size / Price Qty
BAM1402
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Human B7-1/CD80 Biotinylated Antibody Summary

Species Reactivity
Human
Specificity
Detects human B7-1/CD80 in ELISAs and Western blots. Does not cross-react with recombinant mouse (rm) B7‑1, recombinant rat B7‑1, recombinant human (rh) B7-H1, rhB7-H2, rhB7-H3, rhB7‑2, or rmPD‑L2.
Source
Monoclonal Mouse IgG1 Clone # 37721
Purification
Protein A or G purified from hybridoma culture supernatant
Immunogen
S. frugiperda insect ovarian cell line Sf 21-derived recombinant human B7‑1/CD80
Val35-Asn242
Accession # P33681
Formulation
Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
Label
Biotin

Applications

Recommended Concentration
Sample
Western Blot
1 µg/mL
Recombinant Human B7‑1/CD80 Fc Chimera (Catalog # 140-B1)

Human B7-1/CD80 Sandwich Immunoassay

Recommended Concentration
Reagent
ELISA Detection (Matched Antibody Pair)
0.5-2.0 µg/mL 

Use in combination with:

Capture Reagent: Human B7‑1/CD80 Antibody (Catalog # MAB140)

Standard: Recombinant Human B7-1/CD80 Fc Chimera His-tag Protein, CF (Catalog # 140-B1)

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Reconstitution Calculator

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Preparation and Storage

Reconstitution
Reconstitute at 0.5 mg/mL in sterile PBS.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Availability
Size / Price
Qty
RB01
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.
Entrez Gene IDs
941 (Human); 12519 (Mouse); 25408 (Rat); 102140078 (Cynomolgus Monkey)
Alternate Names
Activation B7-1 antigen; B7; B71; B7-1; BB1; CD28LG1; CD28LGB7-1 antigen); CD80 antigen; CD80 molecule; CD80; costimulatory factor CD80; costimulatory molecule variant IgV-CD80; CTLA-4 counter-receptor B7.1; T-lymphocyte activation antigen CD80

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