Formalin-fixed, paraffin-embedded human Tonsil stained with HLA-DRA Mouse Monoclonal Antibody (19-26.1).
Flow Cytometric Analysis of Raji cells. HLA-DRA Monoclonal Antibody (19-26.1) followed by goat anti-Mouse IgG-CF488 (Blue); Isotype control (Red).
SDS-PAGE Analysis Purified HLA-DRA Monoclonal Antibody (19-26.1). Confirmation of Integrity and Purity of Antibody
Known Applications & Suggested Dilutions
Host / Ig Isotype
Mol. Weight of Antigen
Specificity & Comments
This MAb reacts with the HLA-DR antigen, a member of MHC class II molecules. It does not cross react with HLA-DP and HLA-DQ. HLA-DR is a heterodimeric cell surface glycoprotein comprised of a 36kDa alpha (heavy) chain and a 28kDa beta (light) chain. It is expressed on B-cells, activated T-cells, monocytes/macrophages, dendritic cells and other non-professional APCs. In conjunction with the CD3/TCR complex and CD4 molecules, HLA-DR is critical for efficient peptide presentation to CD4+ T cells. It is an excellent histiocytic marker in paraffin sections producing intense cytoplasmic staining. True histiocytic neoplasms are similarly positive. HLA-DR antigens also occur on a variety of epithelial cells and their corresponding neoplastic counterparts.