| Species |
Human |
| Protein Construction |
ICOS/CD278 (Q50A) (Glu21-Phe141)
Accession # Q9Y6W8-1 |
hFc |
| N-term |
C-term |
|
| Purity |
> 95% as determined by BisTris PAGE
> 95% as determined by HPLC |
| Endotoxin Level |
Less than 1EU per μg by the LAL method. |
| Biological Activity |
ICOS/CD278 (Q50A) hFc Chimera, Human captured on CM5 Chip via Protein A can bind Human B7H2, His Tag in SPR assay (Biacore T200). Test result was comparable to standard batch |
| Expression System |
HEK293 |
| Theoretical Molecular Weight |
40.45 kDa |
| Apparent Molecular Weight |
Due to glycosylation, the protein migrates to 55-65 kDa based on Bis-Tris PAGE result. |
| Formulation |
Lyophilized from 0.22μm filtered solution in PBS (pH 7.4). |
| Reconstitution |
Centrifuge the tube before opening. Reconstituting to a concentration more than 100 μg/ml is recommended. Dissolve the lyophilized protein in distilled water. |
| Storage & Stability |
Upon receiving, the product remains stable up to 6 months at -20 °C or below. Upon reconstitution, the product should be stable for 3 months at -80 °C. Avoid repeated freeze-thaw cycles. |
| Target Background |
Inducible co-stimulator (ICOS), also called AILIM (activiation-inducible lymphocyte immunomediatory molecule) and CRP-1 (CD28-related protein-1), is a member of the growing CD28 family of immune costimulatory receptors. Other family members are CD28, CTLA-4 and PD-1. Human ICOS is a homodimeric type I transmembrane protein consisting of 199 amino acids (aa) with a putative 20 aa signal sequence, a 121 aa extracellular domain, a 23 aa transmembrane region, and a 35 aa cytoplasmic domain. |
| Synonyms |
AILIM; CD278; CRP-1; CVID1; ICOS; MGC39850 |
For research use only. Not intended for human or animal clinical trials, therapeutic or diagnostic use.
