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Medical Term:

J chain


a glycopeptide, cysteine-rich polypeptide that is bonded to polymeric IgA and IgM; its function is to ensure correct polymerization of the subunits of IgA and IgM and to be secreted externally.

[joining chain]

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.