page_title: J chain
hierarchical_section_title: J chain
caption_attribution_description: Immunglobulin M-molecule consisting of 5 base-units
context_page_description: A J chain is a protein component of the antibodies IgM and IgA. It is a 137 residue polypeptide, encoded by the IGJ gene.
context_section_description: A J chain is a protein component of the antibodies IgM and IgA.  It is a 137 residue polypeptide, encoded by the IGJ gene.
caption: Immunoglobulin M (IgM) pentameric antibody molecule (consisting of five base units).
  1: Base unit. 
  2: Heavy chains.
  3: Light chains.
  4: J chain.
  5: Intermolecular disulfide bonds.
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