All CD21 reagents are produced in house and quality controlled, including 16 CD21 Antibody, 3 CD21 ELISA, 14 CD21 Gene, 1 CD21 IPKit, 1 CD21 Lysate, 1 CD21 Protein, 1 CD21 qPCR. All CD21 reagents are ready to use.
Recombinant CD21 proteins are expressed by HEK293 Cells with fusion tags as C-His.
CD21antibodies are validated with different applications, which are WB, ELISA, IHC-P, IP, FCM, ELISA(Cap), ELISA(Det).
CD21cDNA clones are full length sequence confirmed and expression validated. There are 13 kinds of tags for each CD21 of different species, especially GFP tag, OFP tag, FLAG tag and so on. There are three kinds of vectors for choice, cloning vector, expression vector and lentivrial expression vector.
CD21ELISA Kit are quality controlled by 8 internation QC standard which guarantee every ELISA Kit with high quality.
The cluster of differentiation (CD) system is commonly used as cell markers in immunophynotyping. Different kinds of cells in the immune system can be identified through the surface CD molecules which associating with the immune function of the cell. There are more than 320 CD unique clusters and subclusters have been identified. Some of the CD molecules serve as receptors or ligands important to the cell through initiating a signal cascade which then alter the behavior of the cell. Some CD proteins do not take part in cell signal process but have other functions such as cell adhesion. CD21, also known as Complement component (3d / Epstein Barr virus) receptor 2 and CR2, is a member of the CD system and is a protein involved in complement system. CD21 is present on all mature B-cells and some T-cells and follicular dendritic cells. CD21 on mature B-cells form a complex called the B cell receptor complex with two other membrane proteins, CD19 and CD81. CD21 has a function in the complement system through serving as the cellular receper specific for ligands such as C3 and C4 which can be attached to foreign macromolecules in order to remove or uptake them. This results in B-cells having enhanced response to the antigen.