Type of antibody:
Releasable fluorochromes, Primary antibodies, Recombinant antibodies
Alternative names:
MHC class II antigen HLA-DM

Specifications for HLA-DM Antibody, anti-human, REAdye_lease™


Clone REAL549 is an antibody fragment derived from the full HLA-DM antibody molecule. It displays no binding to Fc receptors. The recombinantly engineered antibody fragments are multimerized to form the REAdye_lease Complex to bind markers with high avidity.
Clone REAL549 recognizes the human HLA-DM antigen, a non-classical MHC Class II molecule (MHC II) chaperone that works in lysosomes and endosomes. MHC II molecules are transmembrane glycoproteins which function by binding processed antigenic peptides and presenting them to CD4+ T lymphocytes to initiate or maintain a specific immune response. Constitutive MHC II expression is restricted to professional antigen presenting cells including dendritic cells, B cells, and macrophages and to the epithelial cells of the thymus. A high HLA-DM expression is found in lymph nodes, the spleen, and bone marrow. Functional class II expression is highly dependent on the expression of two main chaperones, the invariant chain (Ii) and DM. Newly synthesized class II α- and β-chains form a nonameric complex with three Ii molecules in the endoplasmic reticulum where Ii blocks the peptide-binding groove and guides class II dimers to the endocytic pathway where Ii is proteolytically cleaved leaving the CLIP fragment bound to class II. HLA-DM, an endocytic chaperone, protects empty class II dimers until they bind a peptide capable to confer enough stability to the complex.
For removal of REAdye_lease fluorochromes for optional relabeling with different fluorochrome-conjugated REAdye_lease antibodies use the REAlease Support Kit (130-120-675).

Alternative names

MHC class II antigen HLA-DM

Detailed product information

Technical specifications

Isotype controlControl Antibody
Hostcell line
Type of antibodyReleasable fluorochromes, Primary antibodies, Recombinant antibodies
Alternative names of antigenMHC class II antigen HLA-DM
Distribution of antigenB cells, dendritic cells, macrophages, epithelial cells, antigen-presenting cells, antigen-specific T cells, lymph node, spleen, bone marrow
RRIDAB_2905248, AB_2905247

Resources for HLA-DM Antibody, anti-human, REAdye_lease™


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References for HLA-DM Antibody, anti-human, REAdye_lease™


  1. Oldford, S. A. et al. (2006) Tumor cell expression of HLA-DM associates with a Tʜ1 profile and predicts improved survival in breast carcinoma patients. Int. Immunol. 18(11): 1591-1602
  2. van Lith, M. et al. (2010) HLA-DP, HLA-DQ, and HLA-DR have different requirements for invariant chain and HLA-DM. J. Biol. Chem. 285(52): 40800-40808
  3. Pos, W. et al. (2013) Mechanisms of peptide repertoire selection by HLA-DM. Trends Immunol. 34(10): 495-501

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