CD28/TP44 protein

CD28/TP44

Cat. Num. AAA8532948

• Gene Names: CD28; Tp44
• Purity: Greater than 95% as determined by reducing SDS-PAGE.
• Synonyms: CD28/TP44; CD28; CD28 antigen; CD28 molecule; T-cell-specific surface glycoprotein CD28; Tp44; TP44; CD28/TP44 protein

• Host: Human
• Purity/Purification: Greater than 95% as determined by reducing SDS-PAGE.
• Form/Format: Lyophilized
• Sequence Length: 220

• Expression System: Human Cells
• Reconstitution: Always centrifuge tubes before opening. Do not mix by vortex or pipetting.; It is not recommended to reconstitute to a concentration less than 100 mug/ml.; Dissolve the lyophilized protein in ddH2O.; Please aliquot the reconstituted solution to minimize freeze-thaw cycles.
• Endotoxin: Less than 0.1 ng/ug (1 IEU/ug) as determined by LAL test.
• Preparation and Storage: Lyophilized protein should be stored at <-20 degree C, though stable at room temperature for 3 weeks.; Reconstituted protein solution can be stored at 4-7 degree C for 2-7 days.; Aliquots of reconstituted samples are stable at <-20 degree C for 3 months.

Related Product Information for CD28/TP44 protein

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.
Description: Recombinant Human T-cell-specific surface glycoprotein CD28 is produced by our Mammalian expression system and the target gene encoding Asn19-Pro152 is expressed with a Fc tag at the C-terminus.

NCBI and Uniprot Product Information

• NCBI GI #: 85567176
• NCBI GeneID: 940
• Molecular Weight: 26,186 Da
• NCBI Official Full Name: CD28 antigen
• NCBI Official Synonym Full Names: CD28 molecule
• NCBI Official Symbol: CD28
• NCBI Official Synonym Symbols: Tp44
• NCBI Protein Information: T-cell-specific surface glycoprotein CD28
• UniProt Protein Name: T-cell-specific surface glycoprotein CD28
• UniProt Gene Name: CD28

NCBI Description

The protein encoded by this gene is essential for T-cell proliferation and survival, cytokine production, and T-helper type-2 development. Several alternatively spliced transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Jul 2011]

Uniprot Description

Involved in T-cell activation, the induction of cell proliferation and cytokine production and promotion of T-cell survival. Enhances the production of IL4 and IL10 in T-cells in conjunction with TCR/CD3 ligation and CD40L costimulation (PubMed:8617933). Isoform 3 enhances CD40L-mediated activation of NF-kappa-B and kinases MAPK8 and PAK2 in T-cells (PubMed:15067037).