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Anti-CD22 Antibody Picoband™ (monoclonal, 5E7)
- SPECIFICATION
- CITATIONS
- PROTOCOLS
- BACKGROUND
Application 
| WB, FC |
|---|---|
| Primary Accession | P20273 |
| Host | Mouse |
| Isotype | Mouse IgG2b |
| Reactivity | Human |
| Clonality | Monoclonal |
| Format | Lyophilized |
| Description | Anti-CD22 Antibody Picoband™ (monoclonal, 5E7) . Tested in Flow Cytometry, WB applications. This antibody reacts with Human. |
| Reconstitution | Add 0.2ml of distilled water will yield a concentration of 500 µg/ml. |
| Gene ID | 933 |
|---|---|
| Other Names | B-cell receptor CD22, B-lymphocyte cell adhesion molecule, BL-CAM, Sialic acid-binding Ig-like lectin 2, Siglec-2, T-cell surface antigen Leu-14, CD22, CD22 {ECO:0000303|PubMed:1691828, ECO:0000312|HGNC:HGNC:1643} |
| Calculated MW | 140 kDa |
| Application Details | Western blot, 0.1-0.5 µg/ml, Human Flow Cytometry, 1-3 µg/1x10^6 cells, Human |
| Subcellular Localization | Cell membrane; Single-pass type I membrane protein |
| Tissue Specificity | B-lymphocytes. |
| Contents | Each vial contains 4mg Trehalose, 0.9mg NaCl, 0.2mg Na2HPO4, 0.05mg NaN3. |
| Clone Names | Clone: 5E7 |
| Immunogen | A synthetic peptide corresponding to a sequence at the C-terminus of human CD22, different from the related mouse sequence by ten amino acids. |
| Cross Reactivity | No cross-reactivity with other proteins. |
| Storage | Store at -20˚C for one year from date of receipt. After reconstitution, at 4˚C for one month. It can also be aliquotted and stored frozen at -20˚C for six months. Avoid repeated freeze-thaw cycles. |
| Name | CD22 {ECO:0000303|PubMed:1691828, ECO:0000312|HGNC:HGNC:1643} |
|---|---|
| Function | Most highly expressed siglec (sialic acid-binding immunoglobulin-like lectin) on B-cells that plays a role in various aspects of B-cell biology including differentiation, antigen presentation, and trafficking to bone marrow (PubMed:8627166, PubMed:34330755). Binds to alpha 2,6-linked sialic acid residues of surface molecules such as CD22 itself, CD45 and IgM in a cis configuration. Can also bind to ligands on other cells as an adhesion molecule in a trans configuration (PubMed:20172905). Acts as an inhibitory coreceptor on the surface of B-cells and inhibits B-cell receptor induced signaling, characterized by inhibition of the calcium mobilization and cellular activation. Mechanistically, the immunoreceptor tyrosine-based inhibitory motif domain is phosphorylated by the Src kinase LYN, which in turn leads to the recruitment of the protein tyrosine phosphatase 1/PTPN6, leading to the negative regulation of BCR signaling (PubMed:8627166). If this negative signaling from is of sufficient strength, apoptosis of the B-cell can be induced (PubMed:20516366). |
| Cellular Location | Cell membrane; Single-pass type I membrane protein |
| Tissue Location | B-lymphocytes. |
Thousands of laboratories across the world have published research that depended on the performance of antibodies from Abcepta to advance their research. Check out links to articles that cite our products in major peer-reviewed journals, organized by research category.
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Provided below are standard protocols that you may find useful for product applications.
Background
CD22 is a surface glycoprotein of B lymphocytes that is rapidly phosphorylated on cytoplasmic tyrosines after antigen receptor cross-linking. It is a negative regulator of antigen receptor signaling whose onset of expression at the mature B cell stage may serve to raise the antigen concentration threshold required for B cell triggering. The human CD22 gene is expressed specifically in B lymphocytes and likely has an important function in cell-cell interactions. The B cell coreceptor CD22 plays an important role in regulating signal transduction via the B cell Ag receptor. And CD22 is located within the band region q13.1 of chromosome 19.
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