CD20 Protein, Human, Recombinant (His & Flag) is expressed in HEK293 mammalian cells with C-6xHis-Flag tag. The predicted molecular weight is 34-40 kDa and the accession number is P11836.
| 説明 |
CD20 Protein, Human, Recombinant (His & Flag) is expressed in HEK293 mammalian cells with C-6xHis-Flag tag. The predicted molecular weight is 34-40 kDa and the accession number is P11836. |
| Species |
Human
|
| Expression Host |
HEK293 Cells
|
| Tag |
C-6xHis-Flag
|
| Accession Number |
P11836
|
| 別名 |
CD20, Membrane-spanning 4-domains subfamily A member 1, B-lymphocyte surface antigen B1, Leukocyte surface antigen Leu-16, Bp35, MS4A1, B-lymphocyte antigen CD20
|
| Amino Acid |
Met1-Pro297
|
| Construction |
Met1-Pro297
|
| Protein Purity |
Greater than 80% as determined by reducing SDS-PAGE. (QC verified)
|
| 分子量 |
34-40 kDa (reducing condition)
|
| Endotoxin |
< 0.1 ng/µg (1 EU/µg) as determined by LAL test.
|
| Formulation |
Supplied as a 0.2 μm filtered solution of 50 mM HEPES-Na, 150 mM NaCl, 0.02%DDM, 0.004%CHS, 5%Glycerol, pH7.5.
|
| Stability & Storage |
Lyophilized powders can be stably stored for over 12 months, while liquid products can be stored for 6-12 months at-80℃. For reconstituted proteinsolutions, the solution can be stored at -20°c to -80'c for at least 3 months. Please avoid multiple freeze-thaw cycles and store products in aliquots.
|
| Shipping |
In general, Lyophilized powders are shipping with blue ice. Solutions are shipping with dry ice.
|
| Research Background |
CD20 is a 33-37 kDa non-glycosylated protein expressed on the surface of normal and malignant B lymphocytes, and belongs to the MS4A (membrane-spanning 4-domain family A) protein family. CD20 protein consists of four hydrophobic transmembrane domains, one intracellular and two extracellular domains (large and small loops) with both N- and C- termini residing within the cytosol. CD20 is also known to be physically coupled to major histocompatibility complex class II (MHCII), CD40 molecule, BCR, and the C-terminal src kinase-binding protein (CBP) that interacts with Src kinases such as LYN, FYN, and LCK. CD20 deficiency resulted in a reduced number of circulating memory B cells, reduced isotype switching of Ig, and decreased IgG antibody levels. In agreement with this observation, challenging the patient’s primary B cells in vitro using T-dependent and Tindependent antigens led to the normal proliferation and secretion of IgM but reduced production of IgG.
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