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Recombinant Human ICOS/AILIM Protein (His & Fc Tag)(Active)
SKU: PKSH031664-100
Recombinant Human ICOS/AILIM Protein (His & Fc Tag)(Active)
| SKU # | PKSH031664 |
| Expression Host | HEK293 Cells |
Description
| Synonyms | AILIM, CD278, CVID1, ICOS, Inducible T-cell costimulator, activation-inducible lymphocyte immunomediatory molecule |
| Species | Human |
| Expression Host | HEK293 Cells |
| Sequence | Met 1-Phe 141 |
| Accession | NP_036224.1 |
| Calculated Molecular Weight | 41.6 kDa |
| Observed Molecular Weight | 50 kDa |
| Tag | C-His-Fc |
| Bio-activity | Immobilized human human B7-H2 at 1 μg/ml (100 μl/well) can bind human ICOS with a linear range of 1. 6-200 ng/ml. |
Properties
| Purity | > 90 % as determined by reducing SDS-PAGE. |
| Endotoxin | < 1.0 EU per μg of the protein as determined by the LAL method. |
| 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. |
| Formulation | Lyophilized from sterile PBS, pH 7.4 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. |
Background
Inducible costimulator (ICOS), also called AILIM (activiation-inducible lymphocyte immunomediatory molecule) is a cell-surface receptor, and belongs to the CD28 family of immune costimulatory receptors consisting of CD28, CTLA-4 and PD-1. The interaction of B7-H2/ICOS plays a critical role in Th cell differentiation, T−B cell interactions which is essential for germinal center formation, and humoral immune responses, and as well as the production of cytokine IL-4. In addition, ICOS is more potent in the induction of IL-10 production, a cytokine important for suppressive function of T regulatory cells. The B7-1/B7-2--CD28/CTLA-4 and ICOS-B7RP-1 pathway provides key second signals that can regulate the activation, inhibition and fine-tuning of T-lymphocyte responses. ICOS stimulates both Th1 and Th2 cytokine production but may have a preferential role in Th2 cell development. Moreover, The B7-1/B7-2-CD28/CTLA-4 and ICOS-B7RP-1 pathway has been suggested of being involved in the development of airway inflammation and airway hyperresponsiveness.