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|Tested species reactivity||Human|
|Host / Isotype||Mouse / IgG1|
|Immunogen||Human PHA blasts|
|Contains||0.09% sodium azide|
|Storage Conditions||4°C or -20°C if preferred|
|Tested Applications||Dilution *|
|Flow Cytometry (Flow)||1:50-1:100|
|Immunohistochemistry (Frozen) (IHC (F))||1:10 -1:100|
* Suggested working dilutions are given as a guide only. It is recommended that the user titrate the product for use in their own experiment using appropriate negative and positive controls.
The epitope recognized by this antibody is reported to be sensitive to formaldehyde fixation and tissue processing. We recommend the use of acetone fixation for frozen sections. A suggested positive control for immunohistochemical applications is human lymphatic tissue. For FACS analysis, use 10ul of the suggested working dilution to label 1x10^6 cells in 100ul.
The CD4 antigen is involved in the recognition of the type II MHC antigen. It is also a receptor for HIV. It is present on most T helper cells and normal thymocytes. The cytoplasmic portion of CD4 is associated with p56lck tyrosine kinase. CD4 expression is commonly found in human lymph nodes and tonsils. CD44 is a type 1 transmembrane glycoprotein also known as Phagocytic Glycoprotein-1 (pgp-1) and HCAM. CD44 is the receptor for hyaluronate and exists as a large number of different isoforms due to alternative RNA splicing. The major isoform expressed on lymphocytes, myeloid cells, and erythrocytes is a glycosylated type 1 transmembrane protein. Other isoforms contain glycosaminoglycans and are expressed on hematopoietic and non-hematopoietic cells. CD44 is involved in adhesion of leukocytes to endothelial cells, stromal cells, and the extracellular matrix.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
CD4 antigen (p55); CD4 antigen p55; CD4 receptor; T-cell surface antigen T4/Leu-3