joining chain

synonym: J chain
https://doi.org/10.1351/goldbook.13353
Polypeptide that forms part of the polymeric structure of pentameric immunoglobulin M (IgM) and dimeric immunoglobulin A (IgA).
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1197 [Terms] [Paper]