Product : Antibody >> CD Markers , Innate Immunology , Regulatory T Cells (Treg) , Th17 Antibodies >> CD4 (L3T4)

Monoclonal Antibody to human CD4 Azide Free (Clone RPA-T4)

Cat. No.DescriptionFormatUnitPrice(USD)QuantityBulk Quotation
CD4 (L3T4)Azide-Free
0.1 mg
1 mg (2mg/ml)
25 ug
Catalog No: IMG-5916E
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Contents: CD4 antibody at 0.5 mg/ml in PBS. Filter sterilized. Sodium azide free.  Endotoxin level < 0.06 EU/ug.
Isotype: Mouse IgG1, Kappa
Clone: RPA-T4
Purification: Protein G Chromatography
Species: Human
Host: Mouse
Application: FA (Neutralization): Reported in literature
Flow (Cell Surface): 0.1-0.2 ug/10^6 cells
IHC (frozen): Reported in literature
Storage: Aliquot and store frozen at -20°C.

CD4 is an Immunoglobulin Superfamily  protein and an accessory protein for MHC class-II antigen/ T-cell receptor interaction. It may regulate T-cell activation. It plays a more general role in mediating cell recognition events than merely those of cellular immune response. The T4 molecule serves as a receptor for the human immunodeficiency virus. A Type I membrane protein, it is expressed on T lymphocytes, B-cells, macrophages, and granulocytes. It is also expressed in a developmentally regulated manner in specific regions of the brain.

PHA-stimulated human PBMC.

Application Notes

RPA-T4 is capable of blocking HIV-1, gp120, and inhibits syncytium formation. The RPA-T4 clone reacts with CD4, a 59 kDa single-chain transmembrane glycoprotein [receptor for human HIV virus] present on T-helper/inducer cell populations. This antibody binds to the D1 domain of  CDR1 and CDR3 epitopes. The CD4 antigen and reacts with approvimately 80% of thymocytes and 45% of peripheral blood lymphocytes. CD4 is also present in low density on peripheral blood monocytes.Clone RPA-T4 is widely published in literature, see Knapp W, Dorken B, Rieber E P, et all, ed. Also see Schlossman SF, Boumsell L, Gilks W, et al, ed.

Genebank Info (Protein): NP_000607
Gene ID: 920
CD4 (L3T4) Antibody

Flow cytometric analysis of CD4 in human PBMCs using 0.1 ug of IMG-5916E (clone RPA-T4) per approximately 1x10^6 cells. Secondary antibody is goat anti-mouse PE.


1. Knapp, W., B. Dorken, et al. eds. (1989). Leucocyte Typing IV: White Cell Differentiation Antigens. Oxford University Press. New York.

Research purposes only. Not for diagnostic or in vivo use. This product is guaranteed to perform as indicated on the datasheet for one year from the date of purchase.






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