Anti-Hu CD4 FITC

• Description:

  CD4 (T4) is a single chain transmembrane glycoprotein and belongs to immunoglobulin supergene family. In extracellular region there are 4 immunoglobulin-like domains (1 Ig-like V-type and 3 Ig-like C2-type) . Transmembrane region forms 25 aa, cytoplasmic tail consists of 38 aa. Domains 1,2 and 4 are stabilized by disulfide bonds. The intracellular domain of CD4 is associated with p56Lck, a Src-like protein tyrosine kinase. It was described that CD4 segregates into specific detergent-resistant T-cell membrane microdomains. Extracellular ligands: MHC class II molecules (binds to CDR2-like region in CD4 domain 1) ; HIV envelope protein gp120 (binds to CDR2-like region in CD4 domain 1) ; IL-16 (binds to CD4 domain 3), human seminal plasma glycoprotein gp17 (binds to CD4 domain 1), L-selectin. Intracellular ligands: p56LckCD4 is a co-receptor involved in immune response (co-receptor activity in binding to MHC class II molecules) and HIV infection (human immunodeficiency virus; CD4 is primary receptor for HIV-1 surface glycoprotein gp120) . CD4 regulates T-cell activation, T/B-cell adhesion, T-cell diferentiation, T-cell selection and signal transduction. Defects in antigen presentation (MHC class II) cause dysfunction of CD4+ T-cells and their almost complete absence in patients blood, tissue and organs (SCID immunodeficiency) .

• Certification:

  RUO

• Immunogen:

  Normal human blood lymphocytes

• Target Antigen:

  CD4

• Clone:

  EM4

• Applications:

  FC (QC tested)

• Format:

  FITC

• Buffer:

  Stabilizing phosphate buffered saline (PBS), pH 7.4, 15 mM sodium azide

• References & Citations:

  *Filatov AV, Krotov GI, Zgoda VG, Volkov Y: Fluorescent immunoprecipitation analysis of cell surface proteins: a methodology compatible with mass-spectrometry. J Immunol Methods. 2007 Jan 30;319 (1-2) :21-33., URL: http://www.ncbi.nlm.nih.gov/pubmed/17098248

• Other References:

  *Millan J, Cerny J, Horejsi V, Alonso MA: CD4 segregates into specific detergent-resistant T-cell membrane microdomains. Tissue Antigens. 1999 Jan;53 (1) :33-40., URL: https://pubmed.ncbi.nlm.nih.gov/10082429/

• Storage Conditions:

  Store at 2-8°C. Protect from prolonged exposure to light. Do not freeze.

• Specificity:

  The mouse monoclonal antibody EM4 recognizes an extracellular epitope of CD4 antigen, a 55 kDa transmebrane glycoprotein expressed on a subset of T lymphocytes (“ helper“ T-cells) and also on monocytes, tissue macrophages and granulocytes. This antibody does not block Leu3a and OKT4 binding, and blocks HIV-1 infection in cell to cell system. Very strong flow cytometry staining, brighter than Leu3a, OKT4 and other.

• Applications Notes:

  6

• Species:

  Human

• CAS Number:

  9007-83-4

• Isotype:

  Mouse IgG2a