Anti-CD28 antibody (bs-1297R)

Anti-CD28 antibody 

DATASHEET

Host:Rabbit

Target Protein:CD28

IR:Immunogen Range:1-120/218

Clonality:Polyclonal

Isotype:IgG

Entrez Gene:12487

Swiss Prot:P31041

Source:KLH conjugated synthetic peptide derived from mouse CD28:1-120/218 

Purification:affinity purified by Protein A

Storage:0.01M TBS(pH7.4) with 1% BSA, 0.03% Proclin300 and 50% Glycerol. Shipped at 4℃. Store at -20 °C for one year. Avoid repeated freeze/thaw cycles.

Background:Human CD28 antigen is a 44 kDa disulfide linked homodimeric T cell specific surface glycoprotein. It is a cell adhesion molecule of the immunoglobulin superfamily which is constitutively expressed on most peripheral blood T lymphocytes (approximately 95% of CD4+ cells and 50% of CD8+ cells). Mature thymocytes exhibit higher levels of CD28 than the immature cells. Activation of T cells results in enhanced CD28 expression. T cell activation requires two combined signals provided by antigen presenting cells. The first is mediated via the T cell receptor following its interaction with antigenic peptide MHC complexes, and the second is delivered by accessory or costimulating molecules through their counter receptors on T lymphocytes. CD28 bears structural homology to CTLA 4 which is expressed at very low levels on the surface of CD4+ and CD8+ peripheral blood cells only following activation. CD28 is the natural receptor for the B7/BB 1 ligand (CD80) a 55-60 kDa glycoprotein which is expressed on activated B lymphocytes, on dendritic cells and on interferon gamma treated monocytes. The binding of B7 1/BB 1 molecules to CD28 is involved in T lymphocyte activation and in the initiation and maintenance of chronic inflammation.

Size:100ul

Concentration:1mg/ml

Applications:WB(1:500-2000)
ELISA(1:5000-10000)
IHC-P(1:100-500)
IHC-F(1:100-500)
Flow-Cyt(1μg/Test)
IF(1:100-500)

Cross Reactive Species:Human
Mouse
Rat
Chicken
Dog
Pig
Cow
Horse
.

For research use only. Not intended for diagnostic or therapeutic use.

VALIDATION IMAGES

Sample:
Lane 1: Spleen (Mouse) Lysate at 40 ug
Lane 2: Thymus (Mouse) Lysate at 40 ug
Primary: Anti-CD28 (bs-1297R) at 1/1000 dilution
Secondary: IRDye800CW Goat Anti-Rabbit IgG at 1/20000 dilution
Predicted band size: 50 kD
Observed band size: 50 kD

Sample:
Thymus (Rat) Lysate at 40 ug
Primary: Anti-CD28 (bs-1297R) at 1/1000 dilution
Secondary: IRDye800CW Goat Anti-Rabbit IgG at 1/20000 dilution
Predicted band size: 25 kD
Observed band size: 44kD

Paraformaldehyde-fixed, paraffin embedded (rat stomach tissue); Antigen retrieval by boiling in sodium citrate buffer (pH6.0) for 15min; Block endogenous peroxidase by 3% hydrogen peroxide for 20 minutes; Blocking buffer (normal goat serum) at 37°C for 30min; Antibody incubation with (CD28) Polyclonal Antibody, Unconjugated (bs-1297R) at 1:400 overnight at 4°C, followed by a conjugated secondary (sp-0023) for 20 minutes and DAB staining.

Tissue/cell: mouse lung tissue; 4% Paraformaldehyde-fixed and paraffin-embedded;
Antigen retrieval: citrate buffer ( 0.01M, pH 6.0 ), Boiling bathing for 15min; Block endogenous peroxidase by 3% Hydrogen peroxide for 30min; Blocking buffer (normal goat serum,C-0005) at 37°C for 20 min;
Incubation: Anti-CD28 Polyclonal Antibody, Unconjugated(bs-1297R) 1:200, overnight at 4°C, followed by conjugation to the secondary antibody(SP-0023) and DAB(C-0010) staining