| Species : |
Human |
| Source : |
HEK293 |
| Tag : |
Fc |
| Protein Length : |
18-259 aa |
| Description : |
Myeloid cell surface antigen CD33 is also known as SIGLEC3, Siglecs (sialic acid binding Iglike lectins) and GP67, is a single-pass type I membrane protein which belongs to the immunoglobulin superfamily and SIGLEC (sialic acid binding Ig-like lectin) family. Human CD33/Siglec-3 cDNA encodes a 364 amino acid (aa) polypeptide with a hydrophobic signal peptide, an N-terminal Ig-like V-type domain, one Ig-like C2-type domains, a transmembrane region and a cytoplasmic tail. CD33/Siglec-3 usually considered myeloid-specific, but it can also be found on some lymphoid cells. In the immune response, CD33/Siglec-3 may act as an inhibitory receptor upon ligand induced tyrosine phosphorylation by recruiting cytoplasmic phosphatase(s) via their SH2 domain(s) that block signal transduction through dephosphorylation of signaling molecules. CD33/Siglec-3 induces apoptosis in acute myeloid leukemia. |
| Form : |
Lyophilized from 0.22 μm filtered solution in 50 mM Tris, 100 mM Glycine, 25 mM Arginine, 150 mM NaCl, pH7.5 with trehalose as protectant. |
| Bio-activity : |
Immobilized Human Siglec-3 (R119G), Fc Tag at 5 μg/mL (100 μL/well) can bind Anti-Siglec-3 Antibody, Human IgG1 with a linear range of 0.3-2 ng/mL. |
| Molecular Mass : |
The protein has a calculated MW of 53.1 kDa. The protein migrates as 64-70 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation. |
| Endotoxin : |
Less than 0.2 EU/μg by the LAL method/rFC method. |
| Purity : |
>95% as determined by SDS-PAGE. |
| Storage : |
This product is stable after storage at: -20 to -70 centigrade for 12 months in lyophilized state; -70 centigrade for 3 months under sterile conditions after reconstitution. For long term storage, the product should be stored at lyophilized state at -20 centigrade or lower. Please avoid repeated freeze-thaw cycles. |
| Reconstitution : |
It is recommended that sterile water be added to the vial to prepare a stock solution of 0.2 μg/μL. Centrifuge the vial at 4 centigrade before opening to recover the entire contents. |
