Species |
Human |
Protein Construction |
Siglec-3/CD33 (Asp18-His259) Accession # P20138-1 |
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 |
Measured by its binding ability in a functional ELISA. Immobilized Siglec-3/CD33 hFc Chimera, Human at 0.5μg/ml (100μl/well) on the plate can bind Biotinylated Anti-Siglec3-Antibody, hFc Tag. Test result was comparable to standard batch. |
Expression System |
HEK293 |
Theoretical Molecular Weight |
53.6 kDa |
Apparent Molecular Weight |
Due to glycosylation, the protein migrates to 68-80 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. |

Immobilized Siglec-3/CD33 hFc Chimera, Human, hFc Tag at 0.5 μg/ml (100 μL/well) on the plate. Dose response curve for Biotinylated Anti-Siglec-3 Antibody, hFc Tag with the EC50 of 21.6 ng/ml determined by ELISA.

The purity of Siglec-3/CD33 hFc Chimera, Human is greater than 95% as determined by SEC-HPLC.

Siglec-3/CD33 hFc Chimera, Human on Bis-Tris PAGE under reduced conditions. The purity is greater than 95%.
Target Background |
Sialic-acid-binding immunoglobulin-like lectin (Siglec) that plays a role in mediating cell-cell interactions and in maintaining immune cells in a resting state.They are sialoadhesin/CD169/Siglec-1, CD22/Siglec-2, CD33/Siglec-3, Myelin-Associated Glycoprotein (MAG/Siglec-4a) and Siglecs 5 to 11. To date, no Siglec has been shown to recognized any cell surface ligand other than sialic acids, suggesting that interactions with glycans containing this carbohydrate are important in mediating the biological functions of Siglecs. |
Synonyms |
CD33 molecule; CD33; FLJ00391; gp67; Siglec3; Siglec-3; p67 |
For research use only. Not intended for human or animal clinical trials, therapeutic or diagnostic use.