MeSH definition : A segment of the immunoglobulin heavy chains, encoded by the IMMUNOGLOBULIN HEAVY
CHAIN GENES in the J segment where, during the maturation of B-LYMPHOCYTES; the gene
segment for the variable region upstream is joined to a constant region gene segment
downstream. The exact position of joining of the two gene segments is variable and
contributes to ANTIBODY DIVERSITY. It is distinguished from the IMMUNOGLOBULIN J CHAINS;
a separate polypeptide that serves as a linkage piece in polymeric IGA or IGM.;
A segment of the immunoglobulin heavy chains, encoded by the IMMUNOGLOBULIN HEAVY
CHAIN GENES in the J segment where, during the maturation of B-LYMPHOCYTES; the gene
segment for the variable region upstream is joined to a constant region gene segment
downstream. The exact position of joining of the two gene segments is variable and
contributes to ANTIBODY DIVERSITY. It is distinguished from the IMMUNOGLOBULIN J CHAINS;
a separate polypeptide that serves as a linkage piece in polymeric IGA or IGM.