The antibody MEM-04 reacts with an extracellular epitope of CD50 (ICAM-3), a 120-130 kDa type I membrane protein (immunoglobulin supergene family) expressed on leukocytes, endothelial cells and Langerhans cells, it is negative on platelets and erythrocytes. The MEM-04 blocks DC-SIGN (CD209) binding to ICAM-3 (epitope in D1).
Cross-Reactivity (Details)
Human
Purification
Purified by protein-A affinity chromatography.
Purity
> 95 % (by SDS-PAGE)
Endotoxin Level
Endotoxin level is less than 0.01 EU/µg of the protein, as determined by the LAL test.
Immunogen
Leukocytes of a patient suffering from LGL-type leukemia.
Intercellular adhesion molecule 3,CD50 (intracellular adhesion molecule 3, ICAM-3) is a transmembrane glycoprotein expressed by leukocytes, that serves as a counter-receptor for the lymphocyte function-associated antigen (LFA)-1 integrin. Besides functioning as an adhesive molecule that mediates e.g. the contact between T cells and antigen presenting cells, ICAM-3 regulates affinity of LFA-1 for ICAM-1 and induces T cell activation and proliferation. ICAM-3 plays an essential role in the initiation of the immune response both on T cells and antigen presenting cells and interacts also with CD209 (dendritic cell-specific ICAM-3-grabbing nonintegrin, DC-SIGN), a C-type lectin of dendritic cells and macrophages, this process is involved in dialogue between dendritic cells and granulocytes.,ICAM-3, ICAM-R