Recombinant Human/Cynomolgus CD28/TP44 (N-His)

SKU: PKSH033840

Size: 50μg

Storage: Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80℃. Reconstituted protein solution can be stored at 4-8℃ for 2-7 days. Aliquots of reconstituted samples are stable at < -20℃ for 3 months.

Shipping: This product is provided as lyophilized powder which is shipped with ice packs.

Exp date: 12 months

Category ID_II: Recombinant Proteins

Category ID_III: Immune Checkpoint Proteins

Abbreviation: CD28;TP44

Target Synonym: CD28;CD28 antigen;CD28 molecule;T-cell-specific surface glycoprotein CD28;TP44;Tp44

Research Areas: immunology;Stem cells

Conjugation:

Target Species: Human/Cynomolgus

Expression Host: HEK293 Cells

Application: ELISA

Fusion tag: N-His

UNIProt ID: P10747

Accession: P10747

Background: T-cell-specific surface glycoprotein CD28(CD28) is a single-pass typeI membrane protein which contains one Ig-likeV-type (immunoglobulin-like) domain. It belongs to the immunoglobulin(Ig) superfamily. CD28 is one of the molecules expressed on T cells that provide co-stimulatory signals, which are required for T cell activation.CD28 co-stimulation is necessary for CD4 positive T-cell proliferation and survival, interleukin-2 production, and T-helper type-2 development. Human post-thymic regulatory T cells require CD28 co-stimulation to expand and maintain potent suppressive function in vivo. Apoptosis plays a key role in the age-related decline of CD28 expression and in immunosenescence. 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.

Concentration:

Activity: Immobilized Human/Cynomolgus CD28-His at 2μg/ml (100 μl/well) can bind Anti-CD28 mAb. The ED50 of Anti-CD28 mAb is 15.3 ng/ml.

Sequence: Asn19-Pro152

Purity: > 95 % as determined by reducing SDS-PAGE.

Formulation: Lyophilized from a 0.2 μm filtered solution of 20mM Tris-HCl, 150mM NaCl, pH 8.0.
Normally 5% - 8% trehalose, mannitol and 0.01% Tween 80 are added as protectants before lyophilization.
Please refer to the specific buffer information in the printed manual.

Reconstitution: Please refer to the printed manual for detailed information.

Endotoxin: < 1.0 EU per μg of the protein as determined by the LAL method.

Calculated MW: 16.7 kDa

ObservedMW: 30-40 kDa