\d͡ʒˈe͡ɪ pˈɛpta͡ɪd], \dʒˈeɪ pˈɛptaɪd], \dʒ_ˈeɪ p_ˈɛ_p_t_aɪ_d]\
Definitions of J PEPTIDE
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The immunoglobulin fragments found in the light chain fractions of secretory IMMUNOGLOBULIN A and polymeric IMMUNOGLOBULIN M in a ratio of one J chain per one IMMUNOGLOBULIN A dimer or one IMMUNOGLOBULIN M pentamer. It is a polypeptide with a molecular weight of about 17 kD and probably serves either to bind the components of the globulins together or to transfer the globulins across membranes.
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