Skip to content

Biotinylated Human CD4/LEU3 Protein 4882



  • Expression: HEK293
  • Functional: Yes (ELISA)
  • Amino Acid Range: Lys26-Trp390
SKU: 4882parent Categories: , Tags: , , ,
Weight1 lbs
Dimensions9 × 5 × 2 in
product tag

C-His-Avi, also biotinylated

Biotinylated Human CD4/LEU3 Protein 4882

Size and concentration
100, 500µg and lyophilized
Storage Instructions
Valid for 12 months from date of receipt when stored at -80°C. Recommend to aliquot the protein into smaller quantities for optimal storage. Please minimize freeze-thaw cycles.
Storage buffer
Shipped at ambient temperature.
> 95% as determined by Tris-Bis PAGE
target relevance
CD4, also known as L3T4, T4, and W3/25, is an approximately 55 kDa type I transmembrane glycoprotein that is expressed predominantly on thymocytes and a subset of mature T lymphocytes. It is a standard phenotype marker for the identification of T cell populations.Integral membrane glycoprotein that plays an essential role in the immune response and serves multiple functions in responses against both external and internal offenses. In T-cells, functions primarily as a coreceptor for MHC class II molecule:peptide complex.
Protein names
T-cell surface glycoprotein CD4 (T-cell surface antigen T4/Leu-3) (CD antigen CD4)
Gene names
FUNCTION: Integral membrane glycoprotein that plays an essential role in the immune response and serves multiple functions in responses against both external and internal offenses. In T-cells, functions primarily as a coreceptor for MHC class II molecule:peptide complex. The antigens presented by class II peptides are derived from extracellular proteins while class I peptides are derived from cytosolic proteins. Interacts simultaneously with the T-cell receptor (TCR) and the MHC class II presented by antigen presenting cells (APCs). In turn, recruits the Src kinase LCK to the vicinity of the TCR-CD3 complex. LCK then initiates different intracellular signaling pathways by phosphorylating various substrates ultimately leading to lymphokine production, motility, adhesion and activation of T-helper cells. In other cells such as macrophages or NK cells, plays a role in differentiation/activation, cytokine expression and cell migration in a TCR/LCK-independent pathway. Participates in the development of T-helper cells in the thymus and triggers the differentiation of monocytes into functional mature macrophages. {ECO:0000269|PubMed:16951326, ECO:0000269|PubMed:24942581, ECO:0000269|PubMed:2823150, ECO:0000269|PubMed:7604010}.; FUNCTION: (Microbial infection) Primary receptor for human immunodeficiency virus-1 (HIV-1) (PubMed:12089508, PubMed:16331979, PubMed:2214026, PubMed:9641677). Down-regulated by HIV-1 Vpu (PubMed:17346169). Acts as a receptor for Human Herpes virus 7/HHV-7 (PubMed:7909607). {ECO:0000269|PubMed:12089508, ECO:0000269|PubMed:16331979, ECO:0000269|PubMed:17346169, ECO:0000269|PubMed:2214026, ECO:0000269|PubMed:7909607, ECO:0000269|PubMed:9641677}.
Subellular location
SUBCELLULAR LOCATION: Cell membrane {ECO:0000269|PubMed:12089508, ECO:0000269|PubMed:12517957, ECO:0000269|PubMed:2823150, ECO:0000269|PubMed:2990730}; Single-pass type I membrane protein {ECO:0000269|PubMed:12517957, ECO:0000269|PubMed:15340161, ECO:0000269|PubMed:1708753}. Note=Localizes to lipid rafts (PubMed:12517957, PubMed:9168119). Removed from plasma membrane by HIV-1 Nef protein that increases clathrin-dependent endocytosis of this antigen to target it to lysosomal degradation. Cell surface expression is also down-modulated by HIV-1 Envelope polyprotein gp160 that interacts with, and sequesters CD4 in the endoplasmic reticulum.
TISSUE SPECIFICITY: Highly expressed in T-helper cells. The presence of CD4 is a hallmark of T-helper cells which are specialized in the activation and growth of cytotoxic T-cells, regulation of B cells, or activation of phagocytes. CD4 is also present in other immune cells such as macrophages, dendritic cells or NK cells. {ECO:0000269|PubMed:16951326, ECO:0000269|PubMed:24942581, ECO:0000269|PubMed:8088877}.
SUBUNIT: Forms disulfide-linked homodimers at the cell surface. Interacts with LCK (PubMed:16888650). Interacts with PTK2/FAK1 (PubMed:18078954). Binds to P4HB/PDI. Interacts with IL16; this interaction induces a CD4-dependent signaling in lymphocytes (PubMed:1673145). Interacts (via Ig-like V-type domain) with MHCII alpha chain (via alpha-2 domain) and beta chain (via beta-2 domain); this interaction increases the affinity of TCR for peptide-MHCII. CD4 oligomerization via Ig-like C2-type 2 and 3 domains appears to be required for stable binding to MHCII and adhesion between T cells and APCs (PubMed:21900604, PubMed:27114505, PubMed:7604010). {ECO:0000269|PubMed:11113139, ECO:0000269|PubMed:12089508, ECO:0000269|PubMed:1673145, ECO:0000269|PubMed:16888650, ECO:0000269|PubMed:18078954, ECO:0000269|PubMed:21900604, ECO:0000269|PubMed:27114505, ECO:0000269|PubMed:7604010}.; SUBUNIT: (Microbial infection) Interacts with HIV-1 Envelope polyprotein gp160 and protein Vpu (PubMed:16331979, PubMed:2214026, PubMed:7604010, PubMed:9641677). {ECO:0000269|PubMed:16331979, ECO:0000269|PubMed:2214026, ECO:0000269|PubMed:7604010, ECO:0000269|PubMed:9641677}.; SUBUNIT: (Microbial infection) Interacts with Human Herpes virus 7 surface proteins. {ECO:0000269|PubMed:7909607}.
Post-translational modification
PTM: Palmitoylation and association with LCK contribute to the enrichment of CD4 in lipid rafts. {ECO:0000269|PubMed:1618861}.; PTM: Phosphorylated by PKC; phosphorylation at Ser-433 plays an important role for CD4 internalization. {ECO:0000269|PubMed:2105883, ECO:0000269|PubMed:2512251}.
Target Relevance information above includes information from UniProt accession : P01730
The UniProt Consortium


ELISA with Biotinylated Human CD4/LEU3 Protein
Immobilized Anti-CD4 Antibody, hFc Tag at 2µg/ml (100µl/Well) on the plate. Dose response curve for Biotinylated Human CD4, His Tag with the EC50 of 8.4ng/ml determined by ELISA.
HPLC of Biotinylated Human CD4/LEU3 Protein
The purity of Biotinylated Human CD4 is greater than 95% as determined by SEC-HPLC.
SDS-PAGE gel of Biotinylated Human CD4/LEU3 Protein
Biotinylated Human CD4 on Tris-Bis PAGE under reduced condition. The purity is greater than 95%.


Published literature highly relevant to the biological target of this product and referencing this antibody or clone are retrieved from PubMed database provided by The United States National Library of Medicine at the National Institutes of Health.



relevant to this product


No results found


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.