Product Description |
Recombinant Human CD28H/IGPR-1 Protein is expressed from HEK293 with hFc tag at the C-Terminus.It contains Leu23-Gly150. |
Product Background |
CD28H is constitutively expressed on all naive T cells. Repetitive antigenic exposure, however, induces a complete loss of CD28H on many T cells, and CD28H negative T cells have a phenotype of terminal differentiation and senescence. After extensive screening in a receptor array, a B7-like molecule, B7 homologue 5 (B7-H5), was identified as a specific ligand for CD28H. |
Product Category |
Recombinant Protein / Antibody discovery / Antibody discovery | Others |
Protein |
CD28H/IGPR-1 |
Synonyms |
TMIGD2; IGPR1; IGPR-1; CD28H; TPC1 |
Accession |
|
Species |
Human |
Biotinylated |
no |
Amino Acid Range |
Leu23-Gly150 |
Molecular Weight |
The protein has a predicted MW of 40.7 kDa. Due to glycosylation, the protein migrates to 50-60 kDa based on Bis-Tris PAGE result. |
Activity |
Immobilized Human B7-H7, His Tag at 5ug/ml (100ul/well) on the plate. Dose response curve for Human CD28H, hFc Tag with the EC50 of 63.4ng/ml determined by ELISA (QC Test). The affinity constant of 7.86 nM as determined in SPR assay (Biacore T200). See testing image for detail. |
Product Tag |
C-hFc |
Expression System |
HEK293 |
Purity |
> 95% as determined by Bis-Tris PAGE;> 95% as determined by HPLC |
Endotoxin |
Less than 1 EU per ug by the LAL method. |
Form |
Lyophilized |
Shipping |
Shipped at ambient temperature. |
Formulation |
Lyophilized from 0.22um filtered solution in PBS (pH 7.4). Normally 8% trehalose is added as protectant before lyophilization. |
Reconstitution |
Dissolve the lyophilized protein in distilled water. It is recommended to resuspend at 0.5 mg/mL if the lyophilized powder is 100 ug or less, at 1mg/ml for 500ug or 1mg lyophilized powder. Do not mix by vortex or vigorous shaking. |
Stability And Storage |
-20 to -80°C for 12 months as supplied from date of receipt.;-80°C for 3 months after reconstitution.;Recommend to aliquot the protein into smaller quantities for optimal storage. Please minimize freeze-thaw cycles. |
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