CD20 / MS4A1 (B-Cell Marker) Antibody
Mouse Monoclonal Antibody [Clone SPM618 ]
- SPECIFICATION
- CITATIONS
- PROTOCOLS
- BACKGROUND
Application ![]()
| IHC, IF, FC |
---|---|
Primary Accession | P11836 |
Other Accession | 931, 712553 |
Reactivity | Human |
Host | Mouse |
Clonality | Monoclonal |
Isotype | Mouse / IgG2a, kappa |
Clone Names | SPM618 |
Calculated MW | 33-37kDa |
Gene ID | 931 |
---|---|
Other Names | B-lymphocyte antigen CD20, B-lymphocyte surface antigen B1, Bp35, Leukocyte surface antigen Leu-16, Membrane-spanning 4-domains subfamily A member 1, CD20, MS4A1, CD20 |
Storage | Store at 2 to 8°C.Antibody is stable for 24 months. |
Precautions | CD20 / MS4A1 (B-Cell Marker) Antibody is for research use only and not for use in diagnostic or therapeutic procedures. |
Name | MS4A1 |
---|---|
Synonyms | CD20 |
Function | This protein may be involved in the regulation of B-cell activation and proliferation. |
Cellular Location | Cell membrane; Multi-pass membrane protein. Cell membrane; Lipid-anchor |
Tissue Location | Expressed on B-cells. |

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Background
Recognizes a protein of 30-33kDa, which is identified as CD20. It is a non-Ig differentiation antigen of B-cells and its expression is restricted to normal and neoplastic B-cells, being absent from all other leukocytes and tissues. CD20 is expressed by pre B-cells and persists during all stages of B-cell maturation but is lost upon terminal differentiation into plasma cells. This MAb can be used for immunophenotyping of leukemia and malignant cells, B lymphocyte detection in peripheral blood and B cell localization in tissues. It reacts with the majority of B-cells present in peripheral blood and lymphoid tissues and their derived lymphomas. In lymphoid tissue, germinal center blasts and B-immunoblasts are particularly reactive. It is a reliable antibody for ascribing a B-cell phenotype in known lymphoid tissues. Rarely, CD20-positive T-cell lymphomas have been reported. Reactivity has also been noted with Reed-Sternberg cells in cases of Hodgkin s disease, particularly of lymphocyte predominant type.
References
Tedder, T.F., et al. 1994. CD20: a regulator of cell-cycle progression of B lymphocytes. Immunol. Today 15: 450-454

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